Question

help how do i integrate the following

Answer 1

\[\frac{ 4r }{ \sqrt{1-r ^{4}} }\]

Answer 2

tried integration by parts but it just kept looping,
looked at model answer and does not know what is happening

Answer 3

Have you tried subing \(u=r^2 \) ?

Answer 4

no, thats the given ans's step as well but after subing u=r^2 the numerator would be troublesome wouldn't it?

Answer 5

\[\frac{ 4\sqrt{u} }{ \sqrt{1-u ^{2}} }\]

Answer 6

hold up, not so fast

Answer 7

with \(u\) substitution,
you need to replace both \(r\) and \(dr\)

Answer 8

\[\int \frac{ 4r }{ \sqrt{1-r ^{4}} }\, dr\]

thats your integral, right ?

Answer 9

oh.. ok i think i understand my mistake now give me a sec i will try with this new information

Answer 10

okie good luck!

Answer 11

k i got the ans thanks

Answer 12

np :)