Question

(33,30,27,24,...) vigésimo termo (20)

Answer 1

Boa tarde!

Dados;

A1 → 33

N → 20

R → a2-a1 → 30-33 = -3

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An=a1+(n-1)·r

a20=33+(20-1)·(-3)

a20=33+19·(-3)

a20=33-57

a20=-24

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Att;Guilherme Lima