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Límite de la función Abs((-log(sin(n^(-1/6)))+log(n^(-1/6)))*cos(pi*n/3)/((-log(sin((1+n)^(-1/6)))+log((1+n)^(-1/6)))*cos(pi*(1/3+n/3))))

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Gráfico:

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Solución

Ha introducido [src]
     |       /     /   /  1  \\      /  1  \\    /pi*n\       |
     |       |- log|sin|-----|| + log|-----||*cos|----|       |
     |       |     |   |6 ___||      |6 ___||    \ 3  /       |
     |       \     \   \\/ n //      \\/ n //                 |
 lim |--------------------------------------------------------|
n->oo|/     /   /    1    \\      /    1    \\    /   /1   n\\|
     ||- log|sin|---------|| + log|---------||*cos|pi*|- + -|||
     ||     |   |6 _______||      |6 _______||    \   \3   3//|
     |\     \   \\/ 1 + n //      \\/ 1 + n //                |
$$\lim_{n \to \infty} \left|{\frac{\left(\log{\left(\frac{1}{\sqrt[6]{n}} \right)} - \log{\left(\sin{\left(\frac{1}{\sqrt[6]{n}} \right)} \right)}\right) \cos{\left(\frac{\pi n}{3} \right)}}{\left(\log{\left(\frac{1}{\sqrt[6]{n + 1}} \right)} - \log{\left(\sin{\left(\frac{1}{\sqrt[6]{n + 1}} \right)} \right)}\right) \cos{\left(\pi \left(\frac{n}{3} + \frac{1}{3}\right) \right)}}}\right|$$
Limit(Abs(((-log(sin(n^(-1/6))) + log(n^(-1/6)))*cos((pi*n)/3))/(((-log(sin((1 + n)^(-1/6))) + log((1 + n)^(-1/6)))*cos(pi*(1/3 + n/3))))), n, oo, dir='-')
Gráfica
Respuesta rápida [src]
     |       /     /   /  1  \\      /  1  \\    /pi*n\       |
     |       |- log|sin|-----|| + log|-----||*cos|----|       |
     |       |     |   |6 ___||      |6 ___||    \ 3  /       |
     |       \     \   \\/ n //      \\/ n //                 |
 lim |--------------------------------------------------------|
n->oo|/     /   /    1    \\      /    1    \\    /   /1   n\\|
     ||- log|sin|---------|| + log|---------||*cos|pi*|- + -|||
     ||     |   |6 _______||      |6 _______||    \   \3   3//|
     |\     \   \\/ 1 + n //      \\/ 1 + n //                |
$$\lim_{n \to \infty} \left|{\frac{\left(\log{\left(\frac{1}{\sqrt[6]{n}} \right)} - \log{\left(\sin{\left(\frac{1}{\sqrt[6]{n}} \right)} \right)}\right) \cos{\left(\frac{\pi n}{3} \right)}}{\left(\log{\left(\frac{1}{\sqrt[6]{n + 1}} \right)} - \log{\left(\sin{\left(\frac{1}{\sqrt[6]{n + 1}} \right)} \right)}\right) \cos{\left(\pi \left(\frac{n}{3} + \frac{1}{3}\right) \right)}}}\right|$$