Question

determine o primeiro termo da pg sendo a7=32 e q=2.

Answer 1

n-1
an=a1.q
7-1
a7=a1.2
6
32=a1.2
32=a1.64
32=64a1
64a1=32
a1=32/64
a1=1/2

Answer 2

An=A1.(q)^n-1

32=A1.(2)^7-1

32=A1.64

A1=32/64

A1=0.5