Question

escreva a PA de seis termos em que:
a) a₁= 3 e r= 4
b) a₁= -2 e r= -4

Answer 1

a) 
an = 3 + (6-1).4
an = 3+ 5.4
an = 3+20
an = 23

b)
an = -2 + (6-1). (-4)
an = -2 + 5 .( -4)
an = -2 - 20
an = -22

Answer 2

a) a₁= 3 e r= 4 ==>

3. 7. 10. 13. 16. 20

b) a₁= -2 e r= -4==>

-2.-6. -10.-14.-18.-22