Question

Determine o 62° termo da P.A 9,13,17,21,...

Answer 1

r=a2-a1=13-9=4

an = a1+(n-1)*r

a62= 9 + (62-1)* 4 = 253

Answer 2

r = a₂ - a₁
r = 13 -9 → 4

$A_{n} = a_{1} + (n -1) . r$
a62 = 9 + 61 . 4
a62 = 253