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The differential equation representing t...

The differential equation representing the family of curves y = a sin `(lambda x + alpha)` is :

A

`(d^(2) y)/(dx^(2)) + lambda^(2) y = 0`

B

`(d^(2) y)/(dx^(2)) - lambda^(2) y= 0`

C

`(d^(2) y)/(dx^(2)) + lambda y = 0`

D

None of these

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The correct Answer is:
A
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