Question

calcule os 5 primeiros termos de cada pa a1=12 e r=7

Answer 1

Resposta:

an = a1 + ( n -1) . r = an

an = 12 + ( 1 -1) .7 = 12

an = 12 + ( 2 -1) .7 = 19

an = 12 + ( 3 -1) .7 = 26

an = 12 + ( 4 -1) .7 = 33

an = 12 + ( 5 -1) .7 = 40

===

PA = (12, 19, 26, 33, 40...)