Question

Integrate (dx/xlnx)???

Answer 1

????????????/

Answer 2

= d/lnx

Answer 3

\[\int \frac{dx}{xlnx}\]?

Answer 4

Hint: u substitute for ln(x)

Answer 5

yes.. How to integrate that @Omniscience

Answer 6

u = lnx => du/dx = 1/x

Answer 7

this makes no since, please repost

Answer 8

no sense?

Answer 9

sense*

Answer 10

u = ln(x)
du = 1/x dx

We can replace that in the integral equation

\[\int\limits_{}^{}\frac{ 1 }{ u }du\]

Answer 11

u takes the place of ln(x) and du takes the place of dx/x. YOu are still left with u in the denominator tho be careful

Answer 12

what is dx/x?

Answer 13

1/x dx

Answer 14

a different way to write it

Answer 15

o lil thought it was a typo sorry

Answer 16

can you do the problem now?

Answer 17

ok.. I got it u=ln x
then du/dx=1/x
so xdu=dx
substitute the value
it will be Integrate of du/u so the last answer is ln(lnx)
it is correct???

Answer 18

Ya thats correct. I've never seen u substitution setup quite like that but if it works in your head then more power to ya

Answer 19

Thank all for helping.>>

Answer 20

sorry Ive been drinking rum:)