Question

escreva a pg cuja a razão é 3/5 e a soma dos cinco primeiros termo é 442

Answer 1

A + Ax3/5 + Ax3/5x3/5 + Ax3/5x3/5x3/5 + Ax3/5x3/5x3/5x3/5 = 442

Ax(1+3/5+(3/5)^2+(3/5)^3+(3/5)^4)=442

(1+3/5+(3/5)^2+(3/5)^3+(3/5)^4)/442=1/A

(1+3/5+9/25+27/125+81/625)/442=1/A