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Let f : [-1, 3] to R be defined as {...

Let `f : [-1, 3] to R ` be defined as
`{{:(|x|+[x]", "-1 le x lt 1),(x+|x|", "1 le x lt 2),(x+[x]", "2 le x le 3","):}`
where, [t] denotes the greatest integer less than or equal to t. Then, f is discontinuous at

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