1.

Which of the following differential equations has y = c_(1)e^(x) + c_(2)e^(-x) as the general solution?

Answer»

`(d^(2)y)/(DX^(2)) + y = 0`
`(d^(2)y)/(dx^(2))-y = 0`
`(d^(2)y)/(dx^(2)) + 1 = 0`
`(d^(2)y)/(dx^(2))-1=0`

ANSWER :B


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