resolva as contas abaixo

a) An = - 3n2 + 8

b) An = 5n - 7

c) An = 7n2 – 3n + 2

d) An = n2 + 5

e) An = 2n

f) An = n2 + 2n -1

g) An = 2n2 + 4

h) An = 6n + 2

i) An = - 2n2 + 6

j) An = 3n2 - 2