Q51 of 215 Page 3

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

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