Question

qual a soma da pg infinita ( 1/7, 1/19 )

Answer 1

q=a2/a1

a1=1/7

a2=1/19

q=(1/19)/(1/7) =7/19

Sn=a1/(1-q) .....para -1 < q < 1

Sn=(1/7)/(1-1/19) =(1/7)/(18/19) = 19/(7*18) =19/126