Question

find the first four terms of this geometric sequence a1=3 and r=-3

Answer 1

a , ar, ar^2, ar^3
a1 = a
a2 = ar
a3 = ar^2
a4 = ar^3

Answer 2

whats the answer

Answer 3

a1 = 3
a2 = a*r
a2 = 3*(-3) = -9
a3 = 3*(-3)^2 = 3*9 = 27
a4 = 3*(-3)^3 = 3*(-27) = -81