Question

HELP !!!!
Let f(x) = 3x +2 and g(x) = 7x + 6. Find f • g and its domain.

Answer 1

f o g is just this :

x->g(x)->f(x)->OUTPUT



x is the input,
you send it to g first,
g output you send it to f
you take what f throws out

Answer 2

you can see above that, f(x) is taking the output of g(x) right ?

Answer 3

Yeah.. but im just confused.

Answer 4

think about it like this.
f(g(x)). so this means: f(7x+6) then sub this into f(x). so 3(7x+6) + 2

Answer 5

A. 6x^2 + 4x + 42; all real numbers except x = -2/3
B. 6x^2 + 4x + 42; all real numbers
C. 21x^2 + 32x + 12; all real numbers
D. 21x^2 + 32x + 12; all real numbers except x = -6/7

These are my choices.

Answer 6

I dont get what your saying. I dont know any of this

Answer 7

either b or c

Answer 8

c?

Answer 9

ye, think so