Find an explicit formula in terms of n for a sequence b0, b1, b2 that satisfies bk = (7/b(k-1)) - (10/b(k-2)) for each integer k >= 2 with initial conditions b0 = 7 and b1 = -10.
a) bn = -10 * (1)ⁿ + 7 * (-2)ⁿ
b) bn = -10 * (-1)ⁿ + 7 * (2)ⁿ
c) bn = -10 * (2)ⁿ + 7 * (-1)ⁿ
d) bn = -10 * (2)ⁿ + 7 * (1)ⁿ