Question

interpole 7 termos aritméticos entre 34 e 74

Answer 1

An=A1+(n-1).r
A9=34+(9-1).r
74=34+8.r
74-34=8.r
40÷8=r
r=5

Interpole= (34,39,44,49,54,59,64,69,74)
a1 a9

Answer 2

resolução!

an = a1 + ( n - 1 ) r

74 = 34 + ( 9 - 1 ) r

74 = 34 + 8r

74 - 34 = 8r

40 = 8r

r = 40/8

r = 5

PA = { 34 , 39 , 44 , 49 , 54 , 59 , 64 , 69 , 74 }