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Let f(x) = x + 1/2 , then the number of ...

Let f(x) = x + 1/2 , then the number of real values of x for which the three unequal terms f(x), f(2x), f(4x) are in H.P. is

A

1

B

0

C

3

D

2

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The correct Answer is:
A
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