Question

Improper integrals,

My first time doing improper integrals
, could you help me out on the first one please ?
https://www.dropbox.com/s/wridon5503p8r3z/Screenshot%202013-11-03%2020.24.16.jpg

Answer 1

this can be done also by kutur putur method....

Answer 2

after replacing rt x by u take u^2 common then replace 4/x^2 by another variable.....then diff both sides of 4/x2 to replace with dx

Answer 3

hm