Question

4 meios aritméticos entre -5 e 200

Answer 1

a 1 = -5
a 6 = 200
n = 6
a 6 = a 1 + (n - 1 ).r
a 6 = -5 + (6 - 1 ).r
a 6 = - 5 + 5.r
200 = - 5 + 5.r
200 + 5 = 5 r
205 = 5 r
205 / 5 = r
r = 41
a 2 = a 1 + r ⇒-5 + 41 = 36
a 3 = a 2 + r ⇒36 + 41 = 77
a 4 = a 3 + r ⇒77 + 41 = 118
a 5 = a 4 + r ⇒118 + 41 = 159
a 6 = a 5 + r ⇒ 156 + 41 = 200
 P.A.(-5:36;77;118;159;200)