Question

Question 8 of Integration Calculus

Answer 1

Anyone one would do.

Answer 2

Hello

Answer 3

Let's start with part a

Answer 4

The problem made a substitution of u=x^8+12, right?

Answer 5

@NotTim

Answer 6

eh, i thinkso

Answer 7

Now, can you find du?

Answer 8

8x^7

Answer 9

Right.

Answer 10

7/8(x^8+12)

Answer 11

Wait. Let me rephrase the question.
Sorry.

Answer 12

Forget what I just asked.

Answer 13

You got to the point where du=8x^7
What number do you have to multiply by 8x^7 in order to get to 7x^7?

Answer 14

7/8?

Answer 15

Right!

Answer 16

Now, the original problem was \[\int\limits_{}^{}7x^7 \sqrt{x^8+12}dx=\int\limits_{}^{}A \sqrt{u}du\]

Answer 17

We agreed that du=8x^7

Answer 18

ja

Answer 19

ya

Answer 20

i gotta go; i'll be back real soon.

Answer 21

I have to go, too...

Answer 22

oh darn

Answer 23

???