Un 2004 persamaan grafik parabola pada gambar adalah

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5. UN 2004 Persamaan grafik parabola pada gambar adalah Kemampuan mengerjakan soal akan terus meningkat jika terus berlatih mengerjakan ulang soal yang lalu X (0,4) 0 Y 2 –1 X 0 Y (3, 8) (5, 0) X 0 Y (–1, 2) (0, 1) 21
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LATIH UN Prog. IPA Edisi 2011 SOAL PENYELESAIAN 6. EBTANAS 2003 Grafik fungsi kuadrat dengan titik balik (–1, 4) dan melalui titik (–2, 3), memotong sumbu Y di titik … a. (0, 3) b. (0, 2½ ) c. (0, 2) d. (0, 1½ ) e. (0, 1) Jawab : a 7. EBTANAS 2002 Suatu fungsi kuadrat f(x) mempunyai nilai maksimum 5 untuk x = 2, sedang f(4) = 3. Fungsi kuadrat tersebut adalah … a. f(x) = ½ x 2 + 2x + 3 b. f(x) = – ½ x 2 + 2x + 3 c. f(x) = – ½ x 2 – 2x – 3 d. f(x) = –2x 2 + 2x + 3 e. f(x) = –2x 2 + 8x – 3 Jawab : b 8. UN 2008 PAKET A/B Pak Bahar mempunyai sebidang tanah berbentuk persegi panjang, dengan lebar 10 m kurangnya dari setengah panjangnya. Apabila luasnya 400 m 2 , maka lebarnya adalah … meter a. 60 b. 50 c. 40 d. 20 e. 10 Jawab : e
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