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Question

ƒ(x) = 2x-4, g(x) =3x, and h(x)= x²+x-5. Find each of the following function values.

 

(i) (f⋅g) (2)

 

(ii) (hºf) (1/2) 

Answer 1

ƒ(x) = 2x-4, g(x) =3x, and h(x)= x²+x-5

 

(i) (f⋅g) (2)

     g(2) = 3(2) = 6

     f(6) = 2(6) - 4 = 12 -4 = 8

 

(ii) (hºf) (1/2) 

     f(1/2) = 2(1/2) - 4 = 1 - 4 = -3

     h(-3) = (-3)² - 3 - 5 = 9-8 = 1