Question

Let a second order difference equation be
$y_{n+2} + 4y_n = 4y_{n+1}, \, n=2,3,4,......, \,\, y_0=1, y_1=4$
Then the general solution is

• A. $(1+n^2)2^n$
• B. $(1+n)2^n$
• C. $(1+\frac1{n})2^n$
• D. $(n^2+n+1)2^n$

Answer 1

Answer: (B)

$(1+n)2^n$

Answer 2

The correct option is (B): $(1+n)2^n$