Question

determine a razao de cada um das seguintes progressões aritméticas: A- (-16,-5,6,17,…) B- (22,18,14,10,…) C- (2,11,20,29,…). D- (-3,-12,-21…)

Answer 1

a) (-5)-(-16)= 9
r:11

b)18-22=4
r: -4

c) 11-2= 9
r= 9

d) (-12)-(3)= -9
r:-9

Answer 2

$\mathtt{R = A_2 - A_1}$

A- (-16,-5,6,17,…)

R = - 5 - (-16)
R = - 5 + 16
R = 11

B- (22,18,14,10,…) 

R = 18 - 22
R = -4

C- (2,11,20,29,…)

R = 11 - 2
R = 9

 D- (-3,-12,-21…)

R = - 12 - (-3)
R = - 12 + 3
R = - 9