Mathematics
If f(x) = 3x + 8; the value of f(x) + f(-x) is :
8
16
-8
-16
Factorisation
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Answer
Given,
f(x) = 3x + 8
f(-x) = 3(-x) + 8 = -3x + 8
f(x) + f(-x) = 3x + 8 + (-3x + 8)
= 3x - 3x + 8 + 8
= 16.
Hence, Option 2 is the correct option.
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