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