# Limit calculus

I was reviewing my concepts of limits and didnt manage to solve this one. Probably is simple but im not managing to get it.

Limit (2^x * (x + 1)) / (1 - 3^x)
+oo

i can see the answer is 0 but cant manage to get it...

## Answers and Replies

quasar987
Homework Helper
Gold Member
Recall that $a^x=e^{\ln(a)x}$.

yea, i remember that one...but still no luck in refactoring to a possible 0 result.

Divide top and bottom by 2^x.

Got it... divide by 2^x and then divid again by x.

Thx people ;)