Question

Qual o 20° termo da PA (2,4,6...)?

Answer 1

2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40

A resposta é 40

Answer 2

an=a₁+(n-1)r
an=2+(20-1)2
an=40