F.5 MATHS ......Function

2011-01-01 9:45 pm

Write down the domain and co-domain of the functions

1.y=20
2.y=x^2-7
3.y=5x+2
4.y=2^x

Find tje maximun and minimun value and period of each of the following functions

1.y=6x
2.y=cos x
3.y=-2(x-3)^2-8

Describe the symmetrical property of the graph of each of the following functions

1.y=3(x+1)^2+3
2.y=sin x
3.y=5^x

回答 (1)

ShingMingTony

2011-01-01 10:02 pm

✔ 最佳答案

Write down the domain and co-domain of the functions

1.y=20
domain = all real numbers
co-domain = 20

2.y=x^2-7
domain = all real numbers
co-domain = all real numbers >=7

3.y=5x+2
domain = all real numbers
co- domain = all real numbers

4.y=2^x
domain = all real numbers
co-domain = all positive real numbers

Find the maximun and minimun value and period of each of the following functions

1.y=6x
no max. or min. value, no period

2.y=cos x
max.= 1
min. = -1
period = 2pi

3.y=-2(x-3)^2-8
max = -8
no min. value
no period

Describe the symmetrical property of the graph of each of the following functions

1.y=3(x+1)^2+3
symmetric about x=-1

2.y=sin x
period = 2pi

3.y=5^x
no symmetry

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