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Exercise

$\lim_{n\to\infty}\left(\frac{1}{9^n}-\frac{1}{7^n}\right)$

Final answer to the exercise

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Other solved exercises

$\int-10ydx$

$-8+5-\left(9+12-15\right)-24$

$\left(-31\right)+\left(-6\right)-\left(-18\right)$

$\frac{2}{9}x<7+x$

$\frac{1}{\cot\left(x\right)}=\sin\left(x\right)\sec\left(x\right)$

$x^2-9x-20=0$
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