Question

insira deze meios aritmeticos entre 60 e -5

Answer 1

(4,_,_,_,_,_,_60)
a8=60
60=4+(8-1).R
60=4+7R
56=7R
R=8
(4,12,20,28,36,44,52,60)

Answer 2

An = a₁ + (n - 1) * r

- 5 = 60 + (14 - 1) * r

- 5 = 60 + 13r

13r = - 5 - 60

13r = - 65

r = - 65/13

r = - 5

P.A. (60, 55, 50, 45, 40, 35, 30, 25, 20, 15, 10, 5, 0, - 5).