Differential Equations » Exercise – 1
3. The differential equation formed by y= acosx + bsinx + 4 where a and b are arbitrary constants is :
(a) (d2y/dx2) + y = 0
(b) (d2y/dx2) – y = 0
(c) (d2y/dx2) + y = 4
(d) (d2y/dx2) – y = 4
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