Question

Determine a soma dos termos da P.G. (1/5,1/10,1/20,...)

Answer 1

dados: a1=1/5 , q=1/2 , 1-q=1 -1/2=1/2

s = a1 / 1-q

s = 1/5 / 1/2

s = 1/5 × 2/1

s = 2/5 ✓

Answer 2

resolução!

q = a2/a1

q = 1/10 ÷ 1/5

q = 1/10 * 5/1

q = 5/10

q = 1/2

S = a1 / 1 - q

S = 1/5 ÷ 1 - 1/2

S = 1/5 ÷ 1/2

S = 1/5 * 2/1

S = 2/5