October 2018 1 119 Report
Bantu dong soal ini. udah mentok gw hehe.

Parabola y=x^2-(k+2)x+2k memotong sumbu-Y di (0,c) dan memotong sumbu-X di (a,0) dan (b,0). Jika a+2, c,dan a+2b membentuk barisan aritmatika, maka nilai k adalah ...
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