Respuesta :

amna04352

Answer:

a(1) = 7

a(n) = a(n-1)×(-2)

Step-by-step explanation:

a(1) = 7 (the first term)

Let r be the common ratio:

r = -14/7 = -2

a(n) = a(n-1)×r

a(n) = a(n-1)×(-2)