Question

Sendo (x+1,2x,x+5)uma PA,calcule x e a razão

Answer 1

 (x+1,2x,x+5)


2x - ( x+1) = x + 5 - 2x ==> 2x - x - 1 = x + 5 - 2x

x + x = 5+1 ==> 2x = 6 ==> x = 3
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 x+1 = 3+1 = 4
2x = 2.3 = 6
x+5 = 3+5 = 8

( 4,6,8)