Jawabanmu

2014-06-10T20:42:36+07:00
(a+2), (a-1), (a-7) bar geo

a-1/a+2=a-7/a-1
(a-1)(a-1)=(a+2)(a-7)
a^2-2a+1=a^2-5a-14
3a=-15
a=-5

-5+2, -5-1, -5-7
-3 , -6 , -12
rasionya adalah 2
2014-06-10T20:56:42+07:00
A-1/a+2=a-7/a-1
(a-1)(a-1)=(a+2)(a-7)
a^2-2a+1=a^2-5a-14
3a=-15
a=-5
-5+2, -5-1, -5-7
-3 , -6 , -12
rasio = 2