April 2019 1 69 Report
Diketahui a,b,c berturut turut suku ke 2 , ke 3, ke 4 suatu barisan geometri dengan b>0. jika a.c/b+2 =1,maka nilai b adalah....
A.1
B.2
C.5/2
D.3
E.7/2

*mohon pakai caraaa

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