Question

integrate x^4(e^x)dx

Answer 1

you have to do this by integration by parts

Answer 2

recall the formula or make the table

Answer 3

Which would be better to equal u=x^4 or e^x?

Answer 4

x^4 since you reduce the term to 0.

Answer 5

Thanks. Very much appreciated

Answer 6

no prob.

Answer 7

For my answer I got "x^4 * e^x - 4 integrated e^x * x^3 dx +c" is this correct?

Answer 8

give me a minute

Answer 9

tyt

Answer 10

wait, are you allowed to have integrals in your answers ? or do you have to have it completely integrated ?

Answer 11

it has to be integrated afterwards

Answer 12

because this is what i got :
e^(x)(4x^4-4x^3+12x^2-24x)

Answer 13

hmmmm I'm a little rusty and my notes aren't helping. You're probably right. Im just a little confused

Answer 14

add a +24+c to my answer. Sorry.

Answer 15

what you gave me is right too, you just have to integrate it again which will give you the same answer.

Answer 16

how did you get the -4x^3+ 12x^2-24x

Answer 17

when you use the table you have three columns: U, dv, and a sign. you alternate signs.

Answer 18

my professor hasn't shown us that table?

Answer 19

i havent learned that method to be honest

Answer 20

hmm, i guess you can learn right now lol

Answer 21

lol

Answer 22

i need jesus to teach me

Answer 23

he's probably gonna teach you in a few days
haha.

Answer 24

lol hes a wingspan for giving us a problem that we wont know how to solve

Answer 25

is there another way of solving using uv-integral of vdu?

Answer 26

wingspan* not wingspan

Answer 27

D I C K

Answer 28

yes; you do the table i just did

Answer 29

make a column of u, one of dv and one of sign

Answer 30

I mean, you CAN solve it. Just apply integration by parts 4 times...