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3tg^3x+3tg^2x+3tgx+1=0 la ecuación

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Solución numérica:

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Solución

Ha introducido [src]
     3           2                      
3*tan (x) + 3*tan (x) + 3*tan(x) + 1 = 0
$$\left(\left(3 \tan^{3}{\left(x \right)} + 3 \tan^{2}{\left(x \right)}\right) + 3 \tan{\left(x \right)}\right) + 1 = 0$$
Gráfica
Suma y producto de raíces [src]
suma
    /    /           /          ___\                    \\     /    /           /          ___\                    \\       /    /                             /          ___\\\       /    /                             /          ___\\\                         
    |    |       2/3 |  1   I*\/ 3 |                    ||     |    |       2/3 |  1   I*\/ 3 |                    ||       |    |                         2/3 |  1   I*\/ 3 |||       |    |                         2/3 |  1   I*\/ 3 |||                         
    |    |      2   *|- - - -------|         3 ___      ||     |    |      2   *|- - - -------|         3 ___      ||       |    |          3 ___         2   *|- - + -------|||       |    |          3 ___         2   *|- - + -------|||       /    3 ___    2/3\
    |    |  1        \  2      2   /         \/ 2       ||     |    |  1        \  2      2   /         \/ 2       ||       |    |1         \/ 2               \  2      2   /||       |    |1         \/ 2               \  2      2   /||       |1   \/ 2    2   |
I*im|atan|- - - -------------------- + -----------------|| + re|atan|- - - -------------------- + -----------------|| + - re|atan|- - ----------------- + --------------------|| - I*im|atan|- - ----------------- + --------------------|| - atan|- - ----- + ----|
    |    |  3            3               /          ___\||     |    |  3            3               /          ___\||       |    |3     /          ___\            3          ||       |    |3     /          ___\            3          ||       \3     3      3  /
    |    |                               |  1   I*\/ 3 |||     |    |                               |  1   I*\/ 3 |||       |    |      |  1   I*\/ 3 |                       ||       |    |      |  1   I*\/ 3 |                       ||                         
    |    |                             3*|- - - -------|||     |    |                             3*|- - - -------|||       |    |    3*|- - + -------|                       ||       |    |    3*|- - + -------|                       ||                         
    \    \                               \  2      2   ///     \    \                               \  2      2   ///       \    \      \  2      2   /                       //       \    \      \  2      2   /                       //                         
$$\left(\left(- \operatorname{re}{\left(\operatorname{atan}{\left(\frac{1}{3} - \frac{\sqrt[3]{2}}{3 \left(- \frac{1}{2} + \frac{\sqrt{3} i}{2}\right)} + \frac{2^{\frac{2}{3}} \left(- \frac{1}{2} + \frac{\sqrt{3} i}{2}\right)}{3} \right)}\right)} - i \operatorname{im}{\left(\operatorname{atan}{\left(\frac{1}{3} - \frac{\sqrt[3]{2}}{3 \left(- \frac{1}{2} + \frac{\sqrt{3} i}{2}\right)} + \frac{2^{\frac{2}{3}} \left(- \frac{1}{2} + \frac{\sqrt{3} i}{2}\right)}{3} \right)}\right)}\right) + \left(\operatorname{re}{\left(\operatorname{atan}{\left(- \frac{1}{3} + \frac{\sqrt[3]{2}}{3 \left(- \frac{1}{2} - \frac{\sqrt{3} i}{2}\right)} - \frac{2^{\frac{2}{3}} \left(- \frac{1}{2} - \frac{\sqrt{3} i}{2}\right)}{3} \right)}\right)} + i \operatorname{im}{\left(\operatorname{atan}{\left(- \frac{1}{3} + \frac{\sqrt[3]{2}}{3 \left(- \frac{1}{2} - \frac{\sqrt{3} i}{2}\right)} - \frac{2^{\frac{2}{3}} \left(- \frac{1}{2} - \frac{\sqrt{3} i}{2}\right)}{3} \right)}\right)}\right)\right) - \operatorname{atan}{\left(- \frac{\sqrt[3]{2}}{3} + \frac{1}{3} + \frac{2^{\frac{2}{3}}}{3} \right)}$$
=
                             /    /                             /          ___\\\       /    /           /          ___\                    \\       /    /                             /          ___\\\     /    /           /          ___\                    \\
                             |    |                         2/3 |  1   I*\/ 3 |||       |    |       2/3 |  1   I*\/ 3 |                    ||       |    |                         2/3 |  1   I*\/ 3 |||     |    |       2/3 |  1   I*\/ 3 |                    ||
      /    3 ___    2/3\     |    |          3 ___         2   *|- - + -------|||       |    |      2   *|- - - -------|         3 ___      ||       |    |          3 ___         2   *|- - + -------|||     |    |      2   *|- - - -------|         3 ___      ||
      |1   \/ 2    2   |     |    |1         \/ 2               \  2      2   /||       |    |  1        \  2      2   /         \/ 2       ||       |    |1         \/ 2               \  2      2   /||     |    |  1        \  2      2   /         \/ 2       ||
- atan|- - ----- + ----| - re|atan|- - ----------------- + --------------------|| + I*im|atan|- - - -------------------- + -----------------|| - I*im|atan|- - ----------------- + --------------------|| + re|atan|- - - -------------------- + -----------------||
      \3     3      3  /     |    |3     /          ___\            3          ||       |    |  3            3               /          ___\||       |    |3     /          ___\            3          ||     |    |  3            3               /          ___\||
                             |    |      |  1   I*\/ 3 |                       ||       |    |                               |  1   I*\/ 3 |||       |    |      |  1   I*\/ 3 |                       ||     |    |                               |  1   I*\/ 3 |||
                             |    |    3*|- - + -------|                       ||       |    |                             3*|- - - -------|||       |    |    3*|- - + -------|                       ||     |    |                             3*|- - - -------|||
                             \    \      \  2      2   /                       //       \    \                               \  2      2   ///       \    \      \  2      2   /                       //     \    \                               \  2      2   ///
$$- \operatorname{re}{\left(\operatorname{atan}{\left(\frac{1}{3} - \frac{\sqrt[3]{2}}{3 \left(- \frac{1}{2} + \frac{\sqrt{3} i}{2}\right)} + \frac{2^{\frac{2}{3}} \left(- \frac{1}{2} + \frac{\sqrt{3} i}{2}\right)}{3} \right)}\right)} + \operatorname{re}{\left(\operatorname{atan}{\left(- \frac{1}{3} + \frac{\sqrt[3]{2}}{3 \left(- \frac{1}{2} - \frac{\sqrt{3} i}{2}\right)} - \frac{2^{\frac{2}{3}} \left(- \frac{1}{2} - \frac{\sqrt{3} i}{2}\right)}{3} \right)}\right)} - \operatorname{atan}{\left(- \frac{\sqrt[3]{2}}{3} + \frac{1}{3} + \frac{2^{\frac{2}{3}}}{3} \right)} - i \operatorname{im}{\left(\operatorname{atan}{\left(\frac{1}{3} - \frac{\sqrt[3]{2}}{3 \left(- \frac{1}{2} + \frac{\sqrt{3} i}{2}\right)} + \frac{2^{\frac{2}{3}} \left(- \frac{1}{2} + \frac{\sqrt{3} i}{2}\right)}{3} \right)}\right)} + i \operatorname{im}{\left(\operatorname{atan}{\left(- \frac{1}{3} + \frac{\sqrt[3]{2}}{3 \left(- \frac{1}{2} - \frac{\sqrt{3} i}{2}\right)} - \frac{2^{\frac{2}{3}} \left(- \frac{1}{2} - \frac{\sqrt{3} i}{2}\right)}{3} \right)}\right)}$$
producto
/    /    /           /          ___\                    \\     /    /           /          ___\                    \\\ /    /    /                             /          ___\\\       /    /                             /          ___\\\\                          
|    |    |       2/3 |  1   I*\/ 3 |                    ||     |    |       2/3 |  1   I*\/ 3 |                    ||| |    |    |                         2/3 |  1   I*\/ 3 |||       |    |                         2/3 |  1   I*\/ 3 ||||                          
|    |    |      2   *|- - - -------|         3 ___      ||     |    |      2   *|- - - -------|         3 ___      ||| |    |    |          3 ___         2   *|- - + -------|||       |    |          3 ___         2   *|- - + -------|||| /     /    3 ___    2/3\\
|    |    |  1        \  2      2   /         \/ 2       ||     |    |  1        \  2      2   /         \/ 2       ||| |    |    |1         \/ 2               \  2      2   /||       |    |1         \/ 2               \  2      2   /||| |     |1   \/ 2    2   ||
|I*im|atan|- - - -------------------- + -----------------|| + re|atan|- - - -------------------- + -----------------|||*|- re|atan|- - ----------------- + --------------------|| - I*im|atan|- - ----------------- + --------------------|||*|-atan|- - ----- + ----||
|    |    |  3            3               /          ___\||     |    |  3            3               /          ___\||| |    |    |3     /          ___\            3          ||       |    |3     /          ___\            3          ||| \     \3     3      3  //
|    |    |                               |  1   I*\/ 3 |||     |    |                               |  1   I*\/ 3 |||| |    |    |      |  1   I*\/ 3 |                       ||       |    |      |  1   I*\/ 3 |                       |||                          
|    |    |                             3*|- - - -------|||     |    |                             3*|- - - -------|||| |    |    |    3*|- - + -------|                       ||       |    |    3*|- - + -------|                       |||                          
\    \    \                               \  2      2   ///     \    \                               \  2      2   //// \    \    \      \  2      2   /                       //       \    \      \  2      2   /                       ///                          
$$\left(\operatorname{re}{\left(\operatorname{atan}{\left(- \frac{1}{3} + \frac{\sqrt[3]{2}}{3 \left(- \frac{1}{2} - \frac{\sqrt{3} i}{2}\right)} - \frac{2^{\frac{2}{3}} \left(- \frac{1}{2} - \frac{\sqrt{3} i}{2}\right)}{3} \right)}\right)} + i \operatorname{im}{\left(\operatorname{atan}{\left(- \frac{1}{3} + \frac{\sqrt[3]{2}}{3 \left(- \frac{1}{2} - \frac{\sqrt{3} i}{2}\right)} - \frac{2^{\frac{2}{3}} \left(- \frac{1}{2} - \frac{\sqrt{3} i}{2}\right)}{3} \right)}\right)}\right) \left(- \operatorname{re}{\left(\operatorname{atan}{\left(\frac{1}{3} - \frac{\sqrt[3]{2}}{3 \left(- \frac{1}{2} + \frac{\sqrt{3} i}{2}\right)} + \frac{2^{\frac{2}{3}} \left(- \frac{1}{2} + \frac{\sqrt{3} i}{2}\right)}{3} \right)}\right)} - i \operatorname{im}{\left(\operatorname{atan}{\left(\frac{1}{3} - \frac{\sqrt[3]{2}}{3 \left(- \frac{1}{2} + \frac{\sqrt{3} i}{2}\right)} + \frac{2^{\frac{2}{3}} \left(- \frac{1}{2} + \frac{\sqrt{3} i}{2}\right)}{3} \right)}\right)}\right) \left(- \operatorname{atan}{\left(- \frac{\sqrt[3]{2}}{3} + \frac{1}{3} + \frac{2^{\frac{2}{3}}}{3} \right)}\right)$$
=
/    /    /      3 ___    2/3     3 ___   ___      2/3   ___\\     /    /      3 ___    2/3     3 ___   ___      2/3   ___\\\ /    /    /     2/3   3 ___     3 ___   ___      2/3   ___\\     /    /     2/3   3 ___     3 ___   ___      2/3   ___\\\     /    3 ___    2/3\
|    |    |  1   \/ 2    2      I*\/ 2 *\/ 3    I*2   *\/ 3 ||     |    |  1   \/ 2    2      I*\/ 2 *\/ 3    I*2   *\/ 3 ||| |    |    |1   2      \/ 2    I*\/ 2 *\/ 3    I*2   *\/ 3 ||     |    |1   2      \/ 2    I*\/ 2 *\/ 3    I*2   *\/ 3 |||     |1   \/ 2    2   |
|I*im|atan|- - - ----- + ---- + ------------- + ------------|| + re|atan|- - - ----- + ---- + ------------- + ------------|||*|I*im|atan|- - ---- + ----- + ------------- + ------------|| + re|atan|- - ---- + ----- + ------------- + ------------|||*atan|- - ----- + ----|
\    \    \  3     6      6           6              6      //     \    \  3     6      6           6              6      /// \    \    \3    6       6           6              6      //     \    \3    6       6           6              6      ///     \3     3      3  /
$$\left(\operatorname{re}{\left(\operatorname{atan}{\left(- \frac{1}{3} - \frac{\sqrt[3]{2}}{6} + \frac{2^{\frac{2}{3}}}{6} + \frac{\sqrt[3]{2} \sqrt{3} i}{6} + \frac{2^{\frac{2}{3}} \sqrt{3} i}{6} \right)}\right)} + i \operatorname{im}{\left(\operatorname{atan}{\left(- \frac{1}{3} - \frac{\sqrt[3]{2}}{6} + \frac{2^{\frac{2}{3}}}{6} + \frac{\sqrt[3]{2} \sqrt{3} i}{6} + \frac{2^{\frac{2}{3}} \sqrt{3} i}{6} \right)}\right)}\right) \left(\operatorname{re}{\left(\operatorname{atan}{\left(- \frac{2^{\frac{2}{3}}}{6} + \frac{\sqrt[3]{2}}{6} + \frac{1}{3} + \frac{\sqrt[3]{2} \sqrt{3} i}{6} + \frac{2^{\frac{2}{3}} \sqrt{3} i}{6} \right)}\right)} + i \operatorname{im}{\left(\operatorname{atan}{\left(- \frac{2^{\frac{2}{3}}}{6} + \frac{\sqrt[3]{2}}{6} + \frac{1}{3} + \frac{\sqrt[3]{2} \sqrt{3} i}{6} + \frac{2^{\frac{2}{3}} \sqrt{3} i}{6} \right)}\right)}\right) \operatorname{atan}{\left(- \frac{\sqrt[3]{2}}{3} + \frac{1}{3} + \frac{2^{\frac{2}{3}}}{3} \right)}$$
(i*im(atan(-1/3 - 2^(1/3)/6 + 2^(2/3)/6 + i*2^(1/3)*sqrt(3)/6 + i*2^(2/3)*sqrt(3)/6)) + re(atan(-1/3 - 2^(1/3)/6 + 2^(2/3)/6 + i*2^(1/3)*sqrt(3)/6 + i*2^(2/3)*sqrt(3)/6)))*(i*im(atan(1/3 - 2^(2/3)/6 + 2^(1/3)/6 + i*2^(1/3)*sqrt(3)/6 + i*2^(2/3)*sqrt(3)/6)) + re(atan(1/3 - 2^(2/3)/6 + 2^(1/3)/6 + i*2^(1/3)*sqrt(3)/6 + i*2^(2/3)*sqrt(3)/6)))*atan(1/3 - 2^(1/3)/3 + 2^(2/3)/3)
Respuesta rápida [src]
         /    /           /          ___\                    \\     /    /           /          ___\                    \\
         |    |       2/3 |  1   I*\/ 3 |                    ||     |    |       2/3 |  1   I*\/ 3 |                    ||
         |    |      2   *|- - - -------|         3 ___      ||     |    |      2   *|- - - -------|         3 ___      ||
         |    |  1        \  2      2   /         \/ 2       ||     |    |  1        \  2      2   /         \/ 2       ||
x1 = I*im|atan|- - - -------------------- + -----------------|| + re|atan|- - - -------------------- + -----------------||
         |    |  3            3               /          ___\||     |    |  3            3               /          ___\||
         |    |                               |  1   I*\/ 3 |||     |    |                               |  1   I*\/ 3 |||
         |    |                             3*|- - - -------|||     |    |                             3*|- - - -------|||
         \    \                               \  2      2   ///     \    \                               \  2      2   ///
$$x_{1} = \operatorname{re}{\left(\operatorname{atan}{\left(- \frac{1}{3} + \frac{\sqrt[3]{2}}{3 \left(- \frac{1}{2} - \frac{\sqrt{3} i}{2}\right)} - \frac{2^{\frac{2}{3}} \left(- \frac{1}{2} - \frac{\sqrt{3} i}{2}\right)}{3} \right)}\right)} + i \operatorname{im}{\left(\operatorname{atan}{\left(- \frac{1}{3} + \frac{\sqrt[3]{2}}{3 \left(- \frac{1}{2} - \frac{\sqrt{3} i}{2}\right)} - \frac{2^{\frac{2}{3}} \left(- \frac{1}{2} - \frac{\sqrt{3} i}{2}\right)}{3} \right)}\right)}$$
         /    /                             /          ___\\\       /    /                             /          ___\\\
         |    |                         2/3 |  1   I*\/ 3 |||       |    |                         2/3 |  1   I*\/ 3 |||
         |    |          3 ___         2   *|- - + -------|||       |    |          3 ___         2   *|- - + -------|||
         |    |1         \/ 2               \  2      2   /||       |    |1         \/ 2               \  2      2   /||
x2 = - re|atan|- - ----------------- + --------------------|| - I*im|atan|- - ----------------- + --------------------||
         |    |3     /          ___\            3          ||       |    |3     /          ___\            3          ||
         |    |      |  1   I*\/ 3 |                       ||       |    |      |  1   I*\/ 3 |                       ||
         |    |    3*|- - + -------|                       ||       |    |    3*|- - + -------|                       ||
         \    \      \  2      2   /                       //       \    \      \  2      2   /                       //
$$x_{2} = - \operatorname{re}{\left(\operatorname{atan}{\left(\frac{1}{3} - \frac{\sqrt[3]{2}}{3 \left(- \frac{1}{2} + \frac{\sqrt{3} i}{2}\right)} + \frac{2^{\frac{2}{3}} \left(- \frac{1}{2} + \frac{\sqrt{3} i}{2}\right)}{3} \right)}\right)} - i \operatorname{im}{\left(\operatorname{atan}{\left(\frac{1}{3} - \frac{\sqrt[3]{2}}{3 \left(- \frac{1}{2} + \frac{\sqrt{3} i}{2}\right)} + \frac{2^{\frac{2}{3}} \left(- \frac{1}{2} + \frac{\sqrt{3} i}{2}\right)}{3} \right)}\right)}$$
          /    3 ___    2/3\
          |1   \/ 2    2   |
x3 = -atan|- - ----- + ----|
          \3     3      3  /
$$x_{3} = - \operatorname{atan}{\left(- \frac{\sqrt[3]{2}}{3} + \frac{1}{3} + \frac{2^{\frac{2}{3}}}{3} \right)}$$
x3 = -atan(-2^(1/3)/3 + 1/3 + 2^(2/3)/3)
Respuesta numérica [src]
x1 = -50.6820763300341
x2 = 15.2913693953515
x3 = 34.1409253168903
x4 = 62.4152591991984
x5 = 40.4241106240699
x6 = -3.55818652618723
x7 = -44.3988910228545
x8 = 100.114371042276
x9 = -12.9829644869566
x10 = -82.0980028659321
x11 = -38.115705715675
x12 = -22.407742447726
x13 = 87.5480004279168
x14 = -69.5316322515729
x15 = -100.947558787471
x16 = 78.1232224671474
x17 = -28.6909277549056
x18 = -85.2395955195219
x19 = -16.1245571405464
x20 = -56.9652616372137
x21 = -78.9564102123423
x22 = -31.8325204084954
x23 = -91.5227808267014
x24 = 96.9727783886862
x25 = -47.5404836764443
x26 = -63.2484469443933
x27 = -60.1068542908035
x28 = 74.9816298135576
x29 = 27.8577400097107
x30 = 71.8400371599678
x31 = 24.7161473561209
x32 = 59.2736665456086
x33 = -0.416593872597435
x34 = 81.2648151207372
x35 = -94.6643734802912
x36 = -72.6732249051627
x37 = 68.698444506378
x38 = -88.3811881731116
x39 = 90.6895930815066
x40 = 30.9993326633005
x41 = -53.8236689836239
x42 = 5.86659143458215
x43 = 93.8311857350964
x44 = 52.990481238429
x45 = 46.7072959312495
x46 = 37.2825179704801
x47 = 56.1320738920188
x48 = 18.4329620489413
x49 = -97.805966133881
x50 = -34.9741130620852
x51 = -6.69977917977702
x52 = 84.406407774327
x53 = 2.72499878099236
x54 = 49.8488885848393
x55 = -25.5493351013158
x56 = -75.8148175587525
x57 = -19.2661497941362
x58 = 65.5568518527882
x59 = 9.00818408817194
x60 = -41.2572983692647
x61 = 21.5745547025311
x62 = -66.3900395979831
x63 = -9.84137183336681
x64 = 12.1497767417617
x65 = 43.5657032776597
x65 = 43.5657032776597