Question

Calcule a razão de cada P.A. A)(1/3,1,5/3) B)(-2,0,2,4...) C)(3,5/2,2,3/2...) D)(11,7,4,0,-4,...)?

Answer 1

a) (1/3, 1, 5/3)

$r=a_2-a_1=1-\dfrac{1}{3}=\dfrac{3-1}{3}=\dfrac{2}{3}$

b) (-2, 0,2, 4, ...)

$r=a_2-a_1=0-(-2)=2$

c) (3, 5/2, 2, 3/2,...)

$r=a_2-a_1=\dfrac{5}{2}-3=\dfrac{5-6}{2}=-\dfrac{1}{2}$

d) (11, 7, 4, 0, -4, ...)

$r=a_2-a_1=7-11=-4$