Question

when do we use the comparsion test ... please

Answer 1

Hoot! You just asked your first question! Hang tight while I find people to answer it for you. You can thank people who give you good answers by clicking the 'Good Answer' button on the right!

Answer 2

for integral or series?

Answer 3

if you can bound the integral or series by one you already know converges or diverges, you can tell if your integral or series diverges. For example:
\[\sum_{n=1}^{\infty}\frac{1}{n^2}\]

converges to pi^2/6

so if you want to know if:
\[\sum_{n=1}^{\infty}\frac{1}{(n+3)^2}\]

converges you can compare it to the first since it is going to be smaller, so it must converge a well.

Answer 4

can tell if your integral or series converges or diverges i mean*

Answer 5

for integral and sorry for being late