Let :f:[-1,3]to R be defined as `f(x)={{:(|x|+[x]',', -1lexlt1),(x+|x|',', 1lexlt2),(x+[x]',',

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Let :f:[-1,3]to R be defined as `f(x)={{:(|x|+[x]",", -1lexlt1),(x+|x|",", 1lexlt2),(x+[x]",", 2lexle3):}` Where [t] denotes the greatest integer less than or equal to t. then, f is continuous at :
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