Question

intropole os 11 meios aritmeticos entre 1 e 37

Answer 1

a1 = 1
a13 = 37

a13 = a1 + 12 R
37 = 1 + 12R
12R = 36
R = 3

PA(1,4,7,10,13,16,19,22,25,28,31, 34, 37)

Answer 2

  an= a1 + 12r

    1 + 12r = 37
        12r = 37 -1 
         12r = 36

           r = 3

(1,4,7,10,13,16,19,22,25,28,31,34,37 )