Question

Seja X = 6/7+12/35+24/175+..., calcule X
a) 13/14
b) 10/7
c) 23/14
d) 19/7

Answer 1

Resposta:

Correto 10/7 B)

Explicação passo-a-passo:

pg decrescente e ilimitada

a1= 6/7

q = a2 ÷ a1

q= 12/35 ÷ 6/7

q = 12/35 × 7/6

q = 12/6 × 7/35

q = 2/5

1-q= 1 -2/5= 5/5 -2/5 = 3/5

s = a1 / 1-q

x = 6/7 / 3/5

x = 6/7 × 5/3

x = 30/21 : (3/3)

x = 10/7 ✓