✔ 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