Question

explain: http://www.wolframalpha.com/input/?i=lim+x-%3Epositive+inf+e%5Ex%2F%28axe%5Ex%2B2%29

Answer 1

i don't understand the second step

Answer 2

why?

Answer 3

the second step is \[lim_{x\rightarrow \infty}\frac{e^x}{ae^x +xae^x}=lim_{x\rightarrow\infty}\frac{e^x}{e^x(a+xa)}\]cancel out the \(e^x\) you have step 3. why don't you understand?

Answer 4

hey, my prof gave me a simplest way to calculate it.