Asked by Angie

as x-> + infinity (limit)

3x^4-2x^2/x^4+5x^2

i got positive infinity. is this right
Answered by bobpursley
multiply numerator by 1/x^4

(3-2/x^2) / (1+5/x^2) so the limit is 3
Answered by Angie
i don't get why you would multiply the numerator by that. please explain