February 2019 1 15 Report
Titik puncak grafik fungsi kuadrat f(x) = ax2 + bx + c terletak di sumbu y. jika grafik terbuka ke atas, persamaan fungsi yang mungkin adalah...
A. f(x) = x2 + 2x 6
B. f(x) = -x2 + 2x
C. f(x) = x2 + 2x
D. f(x) = x2 + 6
E. f(x) = -x2 + 6
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