Page 5 - Top Class Mathematics F4

Mathematics Form 4 Chapter 1 Quadratic Functions and Equations in One Variable

(b) f(x) = –6x + 5x – 4 –6 5 – 4 Maximum point
2
Titik maksimum

2
(c) f(x) = 5x – 10 5 0 –10 Minimum point
Titik minimum

(d) f(x) = –x – x –1 –1 0 Maximum point
2
Titik maksimum

2
(e) f(x) = x + 10x – 4 1 10 – 4 Minimum point
Titik minimum

4. Draw the axis of symmetry and state equation of axis of symmetry of each of the following quadratic functions.
Lukis paksi simetri dan nyatakan persamaan paksi simetri bagi setiap fungsi kuadratik yang berikut. PL 2
Example (a) (b)

f(x) f(x) f(x)
6 3 15

4 2 10

2 1 5
x x x
–2 –1 O 1 2 –10 –8 –6 –4 –2 O –1 O 1 2 3
–1 –1

Equation of axis of symmetry: Equation of axis of symmetry: Equation of axis of symmetry:
Persamaan paksi simetri: Persamaan paksi simetri: Persamaan paksi simetri:
x = –1 x = –5 x = 2

(c) (d) (e)

f(x) f(x) f(x)

(0, 2) (20, 2)
(1, 2) (4, 2)

(–1, 0) (2, 0)
x x
O O
x
O

Equation of axis of symmetry: Equation of axis of symmetry: Equation of axis of symmetry:
Persamaan paksi simetri: Persamaan paksi simetri: Persamaan paksi simetri:
x = 10 1 x = 2.5
x =
2

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