Page 51 - PRE-U STPM MATHEMATICS (T) TERM 1

Mathematics Term 1 STPM Answers

7. (a) y (b) y 12. y

1 5
1
4
x
x –1 0 3
–1 0 –1
1
x
–2 0 2 5
8. (a) y (b) y –2
2 –5
1
13.
y
x
0 1 x 4
_
2 0 1 2
3
(c) y (d) y 2
1
4 1 x
3 x 3 0 1 3 3 5
5 0 – – – –
_
– 2 2 2
2 7
– –
3
x
–1 0 –4
14. y
9. 1 , x , 3
8
y
y = |3x – 5| 6
5
3
2
x
y = |x + 1| –4 –2 –1 0 2 4
x
–1 0 1 5 3 –3
–
3
10. x , 4 – 10, 3 – 3 , x , 3 + 3, x . 4 + 10 Exercise 1.4
y 1
y = |x| 1. (a) 1 (b) 2 (c) 13
2
5
2. (a) –7 (b) –2 (c) 11
6 8
2
2
3. (a) x + 5x + 1 (b) x – x – 2
2
2
(c) 5x + 4x – 3 (d) x + 2x – 1
3
2
2
3
y = |x – 7x + 6| (e) 2x + 3x – x – 1
4. (a) A = 1, B = 2 (b) A = 3, B = 4
5
(c) A = 3, B = –1 (d) A = –2, B = , C = 7 3
3
3
3
x (e) A = , B = , C = –2
0 1 7 _ 6 2 2
2
3
2 5. (a) 2x + 3x + 5x + 14
2
3
4
(b) 6x – 13x + 16x – 17x + 3
11.
4
3
2
y (c) 4x + 11x – 10x + 5x – 2
(d) 5x – 7x + 3x + 2x – 3
3
2
5
6 (e) 9x – 4x + 18x – 8
3
2
5
2
5 6. (a) 3x – 5 ; 10 (b) 2x + x + 4 ; 13
2
2
4
(c) x – 3x + 9 ; –30 (d) x – 2x + 3x + 1 ; 0
2
(e) x – x ; 5x – 5
3
7. a = 3, b = –5
8. A = 3, B = 1
1 9. x + x – 1
2
x 10. a = 2, b = 0, c = 3
–4 –2 0 2 4
270
Answers STPM Math T S1.indd 270 3/28/18 4:25 PM