Question

If particular Integral (P.I) of $(D^2-4D+4)y=x^3e^{2x}$ is $e^{mx}\frac{x^n}{20}$, then m2+n2 is equal to:

• A. 29
• B. 30
• C. 31
• D. 28

Answer 1

Answer: (B)

30

Answer 2

The correct option is(B):30.