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Question

If f(x)=4x4x+2, then f(x)+f(1x) is equal to.

A
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B
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C
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D
4
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Solution

The correct option is C 1
f(x)+f(1x)=4x4x+2+41x41x+2=4x4x+2+44+2×4x=4x4x+2+22+4x=1

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