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Let alpha and beta be the distinct roots...

Let `alpha` and `beta` be the distinct roots of `ax^(2) + bx + c = 0` then `underset(x to alpha)(Lt) (1 - cos (ax^(2) + bx + c))/((x - alpha)^(2))` equal to

A

`-(a^(2))/(2) (alpha- beta) ^(2)`

B

`(a^(2))/(2) (alpha -beta)^(2)`

C

`1/2 (alpha - beta)^(2)`

D

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The correct Answer is:
B
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