yagolds1 01/02/2014 An = A1 + (n -1) * rAn = 43A1 = -2r = 3 - ( -2) = 543 = -2 + (n-1) * 543 = -2 + 5n - 543 + 2 + 5 = 5n50 = 5n50/5 = nn = 10P.A. de 10 termos e são eles(-2,3,8,13,18,23,28,33,38,43)
yagolds1
An = A1 + (n -1) * r
An = 43
A1 = -2
r = 3 - ( -2) = 5
43 = -2 + (n-1) * 5
43 = -2 + 5n - 5
43 + 2 + 5 = 5n
50 = 5n
50/5 = n
n = 10
P.A. de 10 termos e são eles
(-2,3,8,13,18,23,28,33,38,43)