# Thread: can you solve this

1. ## can you solve this

2. I'm not 100% sure what the question is asking but I would suggest with

$f(x) = \frac{2^{n}-5^{n+1}}{3^{n}+5^{n}}$ as $n \to \infty$ then $f(x) \to -1$

3. Originally Posted by fearsking
Divide the numerator and denominator of the expression by 5^n:

$\lim_{n \rightarrow + \infty} \frac{ \left( \frac{2}{5}\right)^n - 5}{\left( \frac{3}{5}\right)^n + 1}$.

Now consider the limit. You get -5 as the answer.

4. Hi mr fantastic

I think there's typo in your denominator

5. ## thanx every body

i think mr fantastic is right
thanx
guys

6. Originally Posted by songoku
Hi mr fantastic

I think there's typo in your denominator
Thanks. There was. I've fixed it.