Question #8e17c

1 Answer
Feb 27, 2017

ln|(x - 2)/(x - 3)| + ln|x-2|lnx2x3+ln|x2|

Explanation:

Right off the bat, we can see that we will need to use impartial fraction integrals.

We set it as inta/(x-3)dx + b/(x-2)dxax3dx+bx2dx
ax + bx = 1ax+bx=1
a + b = 1a+b=1
-2a - 3b = -42a3b=4

Solving it out, we get a = -1a=1 and b = 2b=2

int(-1)/(x-3)dx+int2/(x-2)dx1x3dx+2x2dx
-int1/(x-3)dx+2int1/(x-2)dx1x3dx+21x2dx
Integral this -int1/(x-3)dx+int1/(x-2)dx+int1/(x-2)dx1x3dx+1x2dx+1x2dx

to get this -ln|x-3| + 2ln|x-2|ln|x3|+2ln|x2|

Now to integral [-ln|x-3| + 2ln|x-2|]_0^1[ln|x3|+2ln|x2|]10

(-ln|1-3| + 2ln|1-2|) - (-ln|0-3| + 2ln|0-2|)(ln|13|+2ln|12|)(ln|03|+2ln|02|)
=(-ln|-2| + 2ln|-1|) - (-ln|-3| + 2ln|-2|)(ln|2|+2ln|1|)(ln|3|+2ln|2|)
=(-ln2 + ln1) - (-ln3 + 2ln2)(ln2+ln1)(ln3+2ln2)
=-ln2 - ln4/3ln2ln43
=-ln8/3ln83
=-.981.981