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If f(x) = x^2 - 3x + 1 and f (2 alpha) =...

If `f(x) = x^2 - 3x + 1` and `f (2 alpha) = `2 x f(alpha)`=

A

`1/sqrt2`

B

`-1/sqrt2`

C

`1/sqrt2 or - 1/sqrt2`

D

`pm sqrt2`

Text Solution

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The correct Answer is:
C
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