Question

determine o 30° termo da P.A. (3,6,9)
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Answer 1

$> resolucao \\ \\ \geqslant progressao \: aritmetica \\ \\ r = a2 - a1 \\ r = 6 - 3 \\ r = 3 \\ \\ \\ \geqslant o \: 30 \: termo \: da \: pa \\ \\ an = a1 + (n - 1)r \\ an = 3 + (30 - 1)3 \\ an = 3 + 29 \times 3 \\ an = 3 + 87 \\ an = 90 \\ \\ > < > < > < > < > < > < > < > < >$