Question

A soma dos infinitos termos da PG (a; a/2; a/4; a/8...) é igual á:
a) 4a
b)3a
c) 2a
d)5a
e)3a/ 2​

Answer 1

a1=a. q=1/2.....1-q= 1 -1/2=1/2

S=a1 / 1-q

S=a / 1/2

S =a • 2/1

S =2a ✓