Question

a soma dos 15 primeiros termos da PA (6,11,16,...)

Answer 1

6+5= 11
11+5=16
16+5=21
21+5=26
26+5=31
31+5=36
36+5=41
41+5=46
46+5=51
51+5=56
56+5=61
61+5=66
66+5=71
71+5=76
P.A(6,11,16,21,26,31,36,41,46,51,56,61,66,71,76)