Question

Qual o 5° termo da PA (3,10,...) ? * 1 ponto A) 27 B) 28 C) 29 D) 30 E) 31​

Answer 1

$\large\boxed{\begin{array}{l}\tt dados\begin{cases}\sf a_2=10\\\sf r=10-3=7\\\sf a_5=?\end{cases}\\\underline{\rm soluc_{\!\!,}\tilde ao:}\\\sf a_5=a_2+3r\\\sf a_5=10+3\cdot7\\\sf a_5=10+21\\\sf a_5=31\\\huge\boxed{\boxed{\boxed{\boxed{\sf\maltese~alternativa~E}}}}\end{array}}$