Question

obtenha o 20°, o 50° e o 93° termos da P.A (2,5,8,11,...)​

Answer 1

Resposta:

$a)\boxed{59}\\\\b)\boxed{149}\\\\c)\boxed{278}$

Explicação passo-a-passo:

r = 5 - 2 = 3

$a)a_{n}=a_{1}+r(n-1)\\\\a_{20}=a_{1}+19r\\\\a_{20}=2+19.3\\\\a_{20}=2+57\\\\a_{20}=59\\\\b)a_{50}=a_{1}+48r\\\\a_{50}= 2+49.3\\\\a_{50}=2+147\\\\a_{50}=149\\\\c)a_{93}=2+92r\\\\a_{93}=2+92.3\\\\a_{93}=2+ 276\\\\a_{93}=278$