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Let P(x) be quadratic polynomical with r...

Let `P(x)` be quadratic polynomical with real coefficient such tht for all real `x` the relation `2(1 + P(x)) = P(x - 1) + P(x + 1)` holds. If `P(0) = 8` and `P(2) = 32` then
Sum of all coefficients of `P(x)` can not be

A

20

B

19

C

17

D

15

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The correct Answer is:
B
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