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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)(lim) (1 - cos (ax^(2) + bx + c))/((x - alpha)^(2))` equal to

A

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

B

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

C

0

D

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

Text Solution

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The correct Answer is:
D
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