Question 213500
the r is the RATIO of the geometric sequence


r = 3 means that each term is 3 times the previous term


a2 = -4; so a3 = -12, a4 = -36, and a5 = -108


the general term (An) is the first term, multiplied by the ratio raised to the n-1 power


An = a1 * r^(n-1)


in this case ___ An = (-4/3) * 3^(n-1)