Question

Integral help

Answer 1

\[\int\limits_{0}^{1} x^{1}e ^{-x ^{2}} dx\]

Answer 2

Integration by parts... is that a positive one in the exponent of the x?

Answer 3

Yes

Answer 4

U sub will do it... sorry about the parts thing

Answer 5

the -x is raised to the power of 2

Answer 6

yes... your u should be x^2

Answer 7

er... -x^2

Answer 8

I was lik wait

Answer 9

haha

Answer 10

Yes

Answer 11

Don't drink and derive :)

Answer 12

okay so then we find du?

Answer 13

yes... and make a u integral

Answer 14

Is du the the derivative of u+-x^2 ?

Answer 15

U=-x^2

Answer 16

yes

Answer 17

du=-2x dx

Answer 18

OKay du = -2x

Answer 19

du=-2x dx

Answer 20

yes

Answer 21

Okay so do I solve for dx?

Answer 22

I do

Answer 23

so dx=2x du

Answer 24

in this case... leave x dx on the right, because it is in your integral like that

Answer 25

I got -(1/2)du=x dx

Answer 26

oh okay

Answer 27

Iam so tired I have to turn this thing in by midnght with more questions!

Answer 28

Do you just find the anti-derivative and go back to x to finish, or do you change everything to u's and don't go back?

Answer 29

Whichever way you use... the other will sound alien to you.... which sounds familiar? back to x's or don't go back?

Answer 30

U substitution

Answer 31

I understand being tired and having a deadline.... I will try to drag you along.

Answer 32

This one has limits on the integral sign... so we will go back to x's... that is most common.

Answer 33

ohh oops I forgot it was a definate integral

Answer 34

CrAP
what am I doing

Answer 35

See

Answer 36

lol

Answer 37

so I plud in 1 and subtract it from when i PLUG IN ZERO?

Answer 38

I have this\[- \frac{1}{2}\int\limits_{}^{}e ^{u}du\]

Answer 39

I did not get that

Answer 40

It is the u integral after substitution.