2*lnx-0.5x+1=0 la ecuación
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Solución
Suma y producto de raíces
[src]
/ -1/2 \ / -1/2 \
|-e | |-e |
- 4*W|-------| - 4*W|-------, -1|
\ 4 / \ 4 /
$$- 4 W\left(- \frac{1}{4 e^{\frac{1}{2}}}\right) - 4 W_{-1}\left(- \frac{1}{4 e^{\frac{1}{2}}}\right)$$
/ -1/2 \ / -1/2 \
|-e | |-e |
- 4*W|-------| - 4*W|-------, -1|
\ 4 / \ 4 /
$$- 4 W\left(- \frac{1}{4 e^{\frac{1}{2}}}\right) - 4 W_{-1}\left(- \frac{1}{4 e^{\frac{1}{2}}}\right)$$
/ -1/2 \ / -1/2 \
|-e | |-e |
-4*W|-------|*-4*W|-------, -1|
\ 4 / \ 4 /
$$- 4 W\left(- \frac{1}{4 e^{\frac{1}{2}}}\right) \left(- 4 W_{-1}\left(- \frac{1}{4 e^{\frac{1}{2}}}\right)\right)$$
/ -1/2 \ / -1/2 \
|-e | |-e |
16*W|-------|*W|-------, -1|
\ 4 / \ 4 /
$$16 W\left(- \frac{1}{4 e^{\frac{1}{2}}}\right) W_{-1}\left(- \frac{1}{4 e^{\frac{1}{2}}}\right)$$
16*LambertW(-exp(-1/2)/4)*LambertW(-exp(-1/2)/4, -1)
/ -1/2 \
|-e |
x1 = -4*W|-------|
\ 4 /
$$x_{1} = - 4 W\left(- \frac{1}{4 e^{\frac{1}{2}}}\right)$$
/ -1/2 \
|-e |
x2 = -4*W|-------, -1|
\ 4 /
$$x_{2} = - 4 W_{-1}\left(- \frac{1}{4 e^{\frac{1}{2}}}\right)$$
x2 = -4*LambertW(-exp(-1/2/4, -1))