If a and b are arbitrary constants, then the solution to the ordinary different

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If a and b are arbitrary constants, then the solution to the ordinary differential equation d2y/dx2 - 4y = 0 is

Options:

A . y = ax + b

B . y = ae-x

C . y = asin 2x + bcos2x

D . y = acosh 2x + bsinh 2x

Answer: Option D

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