(1)求函数y=(x+2)-2的定义域、值域.讨论当x增大时,函数值如何变化

(1)求函数y=(x+2)-2的定义域、值域.讨论当x增大时,函数值如何变化?并画出图象.

(2)问上述函数的图象与函数y=x-2的图象有何关系?

答案

思路解析:根据幂函数的性质求解.

解:(1)定义域为(1){x|x∈R且x≠-2};值域为R+.当x<-2时,函数值y随x的增大而增大,当x>-2时,y随x的增大而减小.图像略

(2)将y=x-2的图象向左平移2个单位,即得到y=(x+2)-2的图象.


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