Question

If f(x) = −x − 1 and g(x) = 4x − 1, find f[g(−2)]

I think I know the answer, but i'm not positive!

Answer 1

@Luis_Rivera @RadEn @ganeshie8 can you please help me?

Answer 2

g(x) = 4x − 1
g(-2) = 4(-2) - 1 = ...

Answer 3

-9?

Answer 4

yup. correct
now f[g(−2)] = f(-9)
subitute x =-9 into f(x) = -x-1
so, f(-9) = -(-9) - 1 = ...

Answer 5

so the answer is -10?

Answer 6

-(-9) - 1 = 9 - 1 = 8

Answer 7

that was my original answer :) thank you!

Answer 8

welcome