Question

calcular o 10 termo da p.a. (25,2933,37…).

Answer 1

(25+4=29+4=33+4=37+4=41+4=45=4=49+4=53+4=57+4=61) y=x+4   61 a resposta

Answer 2

$a_{n} = a_{10} = ?\\a_{1} =25\\ n=10\\r=4\\\\\\ a_{n} = a_{1} +(n-1)*r\\\\\\ a_{10} = 25 +(10-1)*4\to \\\\a_{10} = 25 +9*4\to \\\\a_{10} = 25 +36\to\\\\ a_{10} = 61$