Question

Integral Calculus substitution rule

Answer 1

you got a problem?

Answer 2

who are you Deniro?

Answer 3

let 3x-2 =u
so that 3dx =du or dx=du/3

Answer 4

De'Niro*

Answer 5

thus the integral takes the form
1/3 * (u^20) du

Answer 6

u = 3x-2
du = 3 dx

1/3 (integral idk how to use it on a keyboard) u^20 du
=1/3 * 1/21 u^21

Answer 7

correct.