Question

Interpelar 12 meios aritméticos entre 15 e 67

Answer 1

Resolucao!

an = a1 + ( n - 1 ) r

67 = 15 + ( 14 - 1 ) r

67 = 15 + 13r

67 - 15 = 13r

52 = 13r

r = 52 / 13

r = 4

PA = { 15 , 19 , 23 , 27 , 31 , 35 , 39 , 43 , 47 , 51 . 55 , 59 , 63 , 67 ... )