Question

calcule o 40° termo da P.A.(21,26,31,36,...)

Answer 1

An: ?
A1: 21
n: 40
R:5

an= a1 + (n-1) x r
an= 21 +(40-1) x5
an= 21 + 39x5
an=21+ 195
an= 216
O 40· Termo é = 216