Question

determine o 75° termo da progressão (5, -3, -11,..)​

Answer 1

Resposta:

$a_n=a_{75}=?\\ a_1=5\\ n=75\\ r=-3-5=-8\\ \\ termo~~geral\\ \\ a_n=a_1+(n-1)r\\ \\ a_{75}=5+(75-1)(-8)\\ \\ a_{75}=5+(74)(-8)\\ \\ a_{75}=5+(-592)\\ \\ a_{75}=5-592\\ \\ a_{75}=-587$