Which characteristic equation corresponds to an=6an−1−11an−2+6an−3a_n = 6a_{n-1} - 11a_{n-2} + 6a_{n-3}an=6an−1−11an−2+6an−3?
r3−6r2+11r−6=0r^3 - 6r^2 + 11r - 6 = 0r3−6r2+11r−6=0
r3+6r2−11r+6=0r^3 + 6r^2 - 11r + 6 = 0r3+6r2−11r+6=0
r3−11r2+6r−6=0r^3 - 11r^2 + 6r - 6 = 0r3−11r2+6r−6=0
r3−6r2−11r−6=0r^3 - 6r^2 - 11r - 6 = 0r3−6r2−11r−6=0