Question

how do you find the integral 3x In(3x) dx ?

Answer 1

most likely by parts

Answer 2

the ln up tends to get tricky; so they use that part for the deriving bit

Answer 3

the set up follows the pattern
\[\int udv=uv-\int vdu\]

Answer 4

what is the answer ive been making attempts for ages!

Answer 5

show me your attempts and I can prolly pinpoint your error

Answer 6

its usually a result of picking a bad u or v part

Answer 7

oh right cool , whats the answer after doing that ?

Answer 8

im not just going to blurt out an answer; but you might try using x as the u part and 3ln(x) as your v part. It should go smoother after that

Answer 9

3ln(3x) .. that is :)

Answer 10

if you show me your procedure, I can tweek it a bit to see where you are missing it at tho

Answer 11

u know what time it is ?

Answer 12

daytime for me .... but that has nothing to do with your question

Answer 13

pole dancing class time yaaayyyyy! no more maths woo

Answer 14

good luck with that :/

Answer 15

thank you!

Answer 16

at my age, the most active "class time" would involve knitting ;)

Answer 17

well mine involves dildos!