Question

If h(x)=(fog)(x) and h(x)=5(x+1)^3, find f(x) and g(x).
A. f(x)=5x^3, g(x)=(x+1)^3
B. f(x)=5x^3, g(x)=x+1
C. f(x)=x+1, g(x)=5x^3
D. f(x)=(x+1)^3, g(x)=5x^3

Answer 1

find (fog)(x) for each options and see which one gives u 5(x+1)^3

Answer 2

A. f(x)=5x^3, g(x)=(x+1)^3

(fog)(x) = f(g(x)) = f((x+1)^3) = 5(x+1)^6

REJECT

Answer 3

similarly test other options and see :)

Answer 4

how do i "fog" the other equations though? :o @ganeshie8

Answer 5

(fog)(x) = f(g(x))

Answer 6

only that we need to remember, rest everything is donkey work :)

Answer 7

B. f(x)=5x^3, g(x)=x+1

(fog)(x) = f(g(x)) = f(x+1) = ?

i want u complete it if u can

Answer 8

madam ...ttry ?

Answer 9

sorry i was helping someone! I'm working on it right now @ganeshie8 :)

Answer 10

@ganeshie8 so f(x)=5x and g(x)=(x+1)³ correct?

Answer 11

nevermind, got the answer :)

Answer 12

hey sorry i slept off... glad u could get to the answer :)

Answer 13

@ganeshie8 could you help me with the same answer please?

Answer 14

because I dont think that (x)=5x and g(x)=(x+1)³ is the correct one