April 2019 1 14 Report
Tiga buah bilangan a+2, a-1, 2a-10 membentuk barisan aritmatika, jika suku tengah ditambah - 1,maka barisan tersebut adalah?
A. 2,4,6
B. 2,4,8
C. 2,5,8
D. 8,4,2
E. 8,5,2
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