Найдите тридцатый член арифметической прогрессии(аn),Если а1=-25 и d=4
a30=a1+(30-1)d
a30=-25+(30-1)4
a30=-25+116
a30=91
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a30=a1+(30-1)d
a30=-25+(30-1)4
a30=-25+116
a30=91