Question

Determine o vigésimo termo da pa (1/4, 7/12, ...)

Answer 1

R = A2/A1 -> R= (7/12)/(1/4) -> R= 7/3
An = A1 + (n - 1).R --> A20 = 1/4 + (20 - 1).7/3
A20 = 1/4 + 133/3 ----->
A20 = 535/12