Question

Whats the integral of ln(x+2)? Im thinking its along the same lines as ln(x)...

Answer 1

x ln(x+2) - x + C .... maybe?

Answer 2

let u = x + 2

Answer 3

The way i am looking at it would end up as (1/x+2)

Answer 4

zbay, thats derivative I think ;)

Answer 5

let u=x+2. so du=dx. therefore we have int(lnu)=u(lnu)-u

Answer 6

<---- I am a big dummy 8(

Answer 7

when the sign say push, you pull right ;)

Answer 8

=(x+2)ln[x+2]-(x+2)+c

Answer 9

You're on to me already

Answer 10

myin, thanx; thats what I was thinking...

Answer 11

you're welcome

Answer 12

hows this look?

Answer 13

looks fine. I would have just a u substitution. let u=x+2 so du=dx
Since u=x+2 then x=u-2 which if we multiply by 6 we have 6x=6(u-2).
so we have int(6(u-2)/u,u)=6int(1-2/u,u)=6int(1,u)-6int(2/u,u)=6u-12lnu+C
=6(x+2)-12(x+2)+C

Answer 14

oops thats suppose to read 6(x+2)-12ln(x+2)+C

Answer 15

.... i still need a looooottt of practice with integrals ;) thanx

Answer 16

you're super smart amistre. where do you go to college?

Answer 17

down here in florida; at the local community college

Answer 18

finally get to take calc1 and stats during the summer.... if the class dont get canceled that is

Answer 19

mathematics is a huge. i still don't know alot of it, and I have a masters

Answer 20

:) I am working on my masters in math.... i figure at least 4 more years ..

Answer 21

I want to get my phd in applied science. I am going to do a research in cryptography with someone in the computer science department who knows less math than me, so it should be interesting since I don't know alot of computer science. I'm mainly interested in the theory of computer science.

Answer 22

thats sounds fun :) I had started out thinking of getting a computer degree since I write my own programs... but math is my best subject since I was a kid :)

Answer 23

me too