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Praktis Ekstra Ting 4 Bab 1

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PRAKTIS EKSTRA
Bab 1: Fungsi dan Persamaan Kuadratik dalam
Satu Pemboleh Ubah
KERTAS 1
1. Punca-punca bagi suatu fungsi kuadratik f (x)
ialah x = 13 dan x = 5. Antara berikut, yang
manakah persamaan paksi simetri bagi fungsi
kuadratik f (x)?
The roots for the quadratic function f (x) are
x = 13 and x = 5. Which of the following is the
equation of the axis of symmetry for the
quadratic function f (x)?
A x=4
B x=5
C x=8
D x=9
4. Rajah di bawah menunjukkan graf fungsi
kuadratik f (x) = px2 – 4x + q.
The diagram shows a graph of quadratic
function f (x) = px2 – 4x + q.
Titik B(1, −9) ialah titik minimum bagi graf
fungsi kuadratik itu. Diberi p ialah integer
dengan keadaan −2 < p < 2. Tentukan nilai
yang mungkin bagi q.
Point B(1, −9) is a minimum point for the graph
of quadratic function. Given p is an integer
where −2 < p < 2. Determine the possible value
of q.
A −6
B −1
C 1
D 6
2. Tentukan koordinat titik maksimum bagi
fungsi kuadratik f (x) = −3x2 + 12x – 5.
Determine the coordinates of the maximum
point for the quadratic function f (x) = −3x2 +
12x – 5.
A (−7, 2)
B (−2, 7)
C (2, 7)
D (7, 2)
3. Ahmad membaling sebiji bola tenis dari atas
sebuah bangunan. Ketinggian, h dalam meter,
bola itu pada masa t saat selepas balingan diberi
dalam bentuk fungsi h(t) = –2t2 + 4t + 6.
Bilakah bola tenis itu akan tiba di permukaan
tanah selepas dibaling?
Ahmad throws a tennis ball from a building.
The height, h in metres, of the ball at t seconds
after the throw given in the form of function h(t)
= –2t2 + 4t + 6. When does the tennis ball reach
the ground surface after thrown?
A 6 saat
6 seconds
B 5 saat
5 seconds
C 4 saat
4 seconds
D 3 saat
3 seconds
 Sasbadi Sdn. Bhd. 198501006847
5. Antara berikut, yang manakah graf bagi fungsi
kuadratik f (x) = −x2 − 3x + 4?
Which of the following is the graph for the
quadratic function f (x) = −x2 − 3x + 4?
A
B
C
1
D
KERTAS 2
Bahagian A
1. Selesaikan persamaan kuadratik berikut.
Solve the following quadratic equation.
−7x2 – 11x + 6 = 0
[3 markah/3 marks]
Jawapan/Answer:
2. Rajah di bawah menunjukkan sebuah segi tiga bersudut tegak.
The diagram shows a right-angled triangle.
Hitung nilai x.
Calculate the value of x.
[4 markah/4 marks]
Jawapan/Answer:
3. Lakar graf fungsi kuadratik berikut.
Sketch the following graph of quadratic function.
f (x) = x2 + 3x – 4
[4 markah/4 marks]
Jawapan/Answer:
 Sasbadi Sdn. Bhd. 198501006847
2
Bahagian B
4. Dua perintang, P dan S, jika disambung secara sesiri, jumlah rintangan ialah 12 Ohm dan jika disambung
secara selari, jumlah rintangan turun kepada 2.25 Ohm. Hitung nilai rintangan bagi setiap perintang itu.
Two resistors, P and S, if connected in series, the total resistance is 12 Ohms and if connected in parallel,
the total resistance goes down to 2.25 Ohms. Find the value of the resistance for each resistor.
*
Diberi rumus jumlah rintangan bagi litar sesiri ialah R = R1 + R2 dan rumus jumlah rintangan bagi litar
selari ialah
1
𝑅
=
1
𝑅1
+
1
𝑅2
.
Given the formula for the total resistance in series circuit is R = R1 + R2 and the formula for the total
resistance in parallel circuit is
1
𝑅
=
1
𝑅1
+
1
𝑅2
.
[8 markah/8 marks]
Jawapan/Answer:
 Sasbadi Sdn. Bhd. 198501006847
3
Jawapan
Kertas 1
1. D
2. C
3. D
4. A
5. A
Kertas 2
1. x =
3
7
, x = 2
2. x = 4
3.
4. Jika rintangan bagi perintang P ialah 9 Ohm, maka rintangan bagi perintang S ialah 3 Ohm.
If the resistance of the resistor P is 9 Ohms, then the resistance of the resistor S is 3 Ohms.
atau/or
Jika rintangan bagi perintang P ialah 3 Ohm, maka rintangan bagi perintang S ialah 9 Ohm.
If the resistance of the resistor P is 3 Ohms, then the resistance of the resistor S is 9 Ohms.
 Sasbadi Sdn. Bhd. 198501006847
4
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