Question

Interpole 12 meios aritméticos entre -5 e 60

Answer 1

-5,0,5,10,15,20,25,30,35,40,45,50,55,60

a1= -5
an= 60
n= 14
r= ?

60=-5+(14-1).r
60=-5+13.r
60+5=13.r
65=13r
65÷13=5

razão=5

Answer 2

a1 = - 5
an = 60
n = 2+12 = 14

an = a1 + (n-1).r

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

13r = 60+5 ==> 13r = 65 ==> r = 5

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