Question

Interpole Quatro meios aritméticos entre -12 e 48?

Answer 1

n= 6
a1= -12
an= 48
48= -12(6-1)r
48= -12+5r
48+12=5r
60/5 =r
12r
{-12, 0, 12, 24, 36, 48}

Answer 2

an = a1 + (n-1)r

an=48
a1= -12
n=6
r = ?

48= -12 + (6-1) r
48 = -12 + 5r
48 + 12 = 5r
r = 12

{-12; 0; 12; 24; 36;48}