Question

Reduce the equation x³y'" + 3 x² y" + xy' + 8y = 65 cos (logx)
into linear equation
with constant coefficient​

Answer 1

Step-by-step explanation:

Put t = log x or x = et Thus, we have xy′ = Dy, n2y′′ = D(D – 1)y x3y′′′ = D(D – 1) (D – 2)y where D = d/dt Hence, the given d.e.