17.函效y=f(x)的图象如图所示,则y=f(x)的解析式是( )
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A. | f(x)=$\left\{\begin{array}{l}{1-x,x<1}\\{x-1,x≥1}\end{array}\right.$ | |
B. | f(x)=$\left\{\begin{array}{l}{-x-1,x<-1}\\{1+x,-1≤x<0}\\{1-x,0≤x≤1}\\{x-1,x>1}\end{array}\right.$ | |
C. | f(x)=$\left\{\begin{array}{l}{{x}^{2}-1,x>1或x<-1}\\{1-{x}^{2},-1≤x≤1}\end{array}\right.$ | |
D. | f(x)=$\left\{\begin{array}{l}{{x}^{2}+2x+1,x≤0}\\{{x}^{2}-2x+1,x>0}\end{array}\right.$ |