Question

Prove that lim x^4 Cos 2/x= 0
x->0

Answer 1

i've done this already for u. didn't i? o<x^4cos(2/x)<x^4
now apply limit x-->0 and u'll get it to be 0.

Answer 2

No, this is different.

Answer 3

i guess they'r not...
but wat ever , the technique i've given above works :)