Question

Find the 7th term of the geometric progression which begins:
2, -6, 18...

Answer 1

a7=1458

Explanation:

2; -6; 18... a geometric progression

a1=2; a2=-6; a3=18

r=a2/a1=-6/2

r= -3

a7=a1*r⁶

a7=2*(-3)⁶=2*729

a7=1458