Question

Evaluate (f o g)(-12)

Answer 1

\[f(x)=1-4x ^{2}, g(x)=\sqrt{1-2x}\]

Answer 2

i don't get the (-12) part

Answer 3

f o g = f(g(x)) = f( sqrt[1-2x] ) = 1 - 4*[sqrt{1-2x}] ^2
u will get an equation
put -12 in that equation

Answer 4

f o g means f o g(x) = .....
then f o g(-12) = put -12 instead of x in the resulting expresion

Answer 5

so i'll just substitute x with -12

Answer 6

ya but when u simplify the equation
f o g (x) = f(g(x)) = f( sqrt[1-2x] ) = 1 - 4*[sqrt{1-2x}] ^2=1-4[1-2x] = 8x - 3
now put -12 so u get 8(-12) -3

Answer 7

thanks

Answer 8

np

Answer 9

most welcome