Which recurrence relation has the characteristic equation r2−r−6=0r^2 - r - 6 = 0r2−r−6=0?
an=an−1+6an−2a_n = a_{n-1} + 6a_{n-2}an=an−1+6an−2
an=6an−1+an−2a_n = 6a_{n-1} + a_{n-2}an=6an−1+an−2
an=an−1−6an−2a_n = a_{n-1} - 6a_{n-2}an=an−1−6an−2
an=6an−1−an−2a_n = 6a_{n-1} - a_{n-2}an=6an−1−an−2