Question

Qual o vigésimo terceiro termo da PA=(10,17,24...)?

Answer 1

$PA~~(10,17,24...)\\\\\\ a_1=10\\ r\to~17-10=7\\ n=23\\ a_n=a_{23}=?\\\\\\ a_n=a_1+(n-1)\times r\\\\ \\a_{23}=10+(23-1)\times 7\to\\\\ a_{23}=10+22\times 7\to\\\\ a_{23}=10+154\to\\\\ \large\boxed{a_{23}=164}$