Consider the equation y"+ay'+by=f(x) where a and b are real constants. If the general solution of the differential equation is of the form y(2) = C, + Cze²= +z² then f(x) is equal to: Oa) 6z – 22 O b) 6z + 2z Oc) 6z + 6z? Od) 6z – 6z2

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