Tugas Kalkulus: sistem persamaan pertemuan 3
TUGAS KALKULUS PERTEMUAN 3
Oleh Tubagus Ardian Maulana
1. 2X + 6 = X + 1
2X – X = 1 – 6
X = -5
2. 3 ( X – 2) = X +1
3X – 6 = X + 1
3X – X = 6 + 1
2X = 7
X = 7/2
3. 2X + 6 / 5 = NIM X + 1
2X + 6 / 5 = 1X +1
2X + 6 = 5 (1X + 1)
2X + 6 = 5X + 5
2X – 5X = 6 – 5
-3X = 1
X = 1/3
4. X2 – 7X + 12 = 0
(X – 4) (X – 3) =0
X = -4 X = -3
5. X3 + 2X2 – X3 + X - 1 = 0
(2X - 1) (X + 1) = 0
2X – 1 = 0 X + 1 = 0
2X = 1 X = -1
X = 1/2
HP = {-1, 1/2}
6. |X| = 4
X = ± 4
X = 4, -4
7. |X| = NIM
|X| = 1
X = ± 1
X = 1, -1
8. |2X – 3| = 1
2X – 3= ± 1
2X – 3 = 1 2X – 3 = -1
2X = 1 + 3 2X = -1 + 3
2X = 4 2X = 2
X = 2 X = 1
9. |2X + 7| = 1
2X + 7 = ± 1
2X + 7 = 1 2X + 7 = -1
2X = 1 – 7 2X = -1 – 7
2X = -6 2X = -8
X = -3 X = -4
10. |X/4| = 1
X/4 = ± 1
X/4 = 1 X/4 = -1
X = 4 X = -4
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