Question

Calcule a soma dos infinito termo da P.G (1/1;1/3;1/9;1/27)

Answer 1

a1 =1
q= 1/9 / 1/3  = 1/9 * 3/1 = 3/9 = 1/3 ***

S = ( a1 / ( 1 - q)
S = 1/1 ( 1/1 - 1/3 )
S = 1/1/ ( 2/3 )
S = 1/1 : 2/3 = 1/1 * 3/2  = 3/2 ***