1.

The complementary function of the differential equation (D2 – D) y = ex is _____ (a) A + B ex (b) (Ax + B) ex (c) A + B e-x (d) (A + Bx) e-x

Answer»

(a) A + B ex 

m2 – m = 0 

m(m – 1) = 0 

CF = Ae0x + Bex = A + B ex



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