Mark the correct alternative in each of the following: Let f: R → R be defined as Then, find f(–1) + f(2) + f(4)

Question

Philoid · Accepted Answer

Given that f: R → R be defined as

For f(-1):

f(x) = 3x

⇒ f(-1) = -3

For f(2):

f(x) = x²

⇒ f(2) = 4

For f(4):

f(x) = 2x

⇒ f(4) = 8

f(–1) + f(2) + f(4) = -3 + 4 + 8

⇒ f(–1) + f(2) + f(4) = 9