Question

Determine o quinto termo da P.A que possui o primeiro termo igual a 7 e a razão 8

Answer 1

Resposta:

$\red{a_{5} = 39}$

Explicação passo-a-passo:

an = a1 + ( n - 1 ) . r

$a</strong><strong>_</strong><strong>{</strong><strong>5</strong><strong>}</strong><strong> = 7 + (5 - 1).8 \\ a</strong><strong>_</strong><strong>{</strong><strong>5 </strong><strong>}</strong><strong>= 7 + 4.8 \\ a</strong><strong>_</strong><strong>{</strong><strong>5 </strong><strong>}</strong><strong>= 7 + 32 \\ \red{a</strong><strong>_</strong><strong>{</strong><strong>5</strong><strong>}</strong><strong> = 39}$

espero ter ajudado :)