2 math hw questions on linear recurrences

Q1. Suppose that the sequence x0, x1, x2… is defined by x0 = 0, x1 = 7, and xk+2 = xk+1+6xk for k≥0. Find a general formula for xk. Be sure to include parentheses where necessary, e.g. to distinguish 1/(2k) from 1/2k.

after we do Q1, Q2 will show up and i’ll send it here.