Question

Resolva a equação x + x/3 + x/9 + ... = 4

Answer 1

a1=x

q= x/3 ÷ x = x/3 × 1/x = x/3x = 1/3

(1-q)= 1 -1/3 = (2/3)

S = a1/(1-q)

4 = x/(2/3)

x = 4.(2/3)

x = 8/3 ✓