Question

p.a.(-8,-5,-2..22) resultado

Answer 1

a1 = -8
an = 22
r = -5 -(-8) --> r = -5+8 --> r = 3
an = a1+(n-1).r
22 = -8+(n-1).3
22+8 = 3n-3
30 = 3n - 3
3n = 30+3
3n = 33
n = 33/3
n = 11(número de termos)
PA = (-8, -5, -2, 1, 4, 7, 10, 13, 16, 19, 22)