Question

determine o 25° termo da p.a (22,42..)

Answer 1

a1 = 22
r = a2 - a1 = 42 - 22 = 20
n = 25
an = ?

an = a1 + (n-1)r
an = 22 +(25-1).20
an = 22 + 24.20
an = 22 + 480
an = 502

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