Question

If a7,a8, and a9 of the geometric sequence with a1=5 and r=-2?

Answer 1

Answer:

a = 1

r = 2

a7 = a r^6 = 1×2^6 = 64

a8 = a r^7 = 1×2^7 = 128

a9 = a r^8 = 1×2^8 = 256

Answer 2

Answer:

this is correct....................