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Question

Question 7
If p(x) = x + 3 , then p(x) + p(-x) is equal to

A) 3
B) 2x
C) 0
D) 6

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Solution

The answer is D.
Given p(x) = x +3 , put x = -x in the given equation,

We get, p (-x) = -x+3

Now, p(x) + p(-x) = x + 3 + (-x) + 3 = 6


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