[f(x)={[(1-cos x)/(x^(2)),],[1,]," when ...

[f(x)={[(1-cos x)/(x^(2)),],[1,]," when "x!=0;" is discontinuous at "x=0],[f(x)={[2-x,," when "x=0]quad " is discontinuous at "x=0],[f(x)={[2-x,,x<2]]

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