Let f : [-1, 3] → R be defined as\(f\left( x \right) = \left\{ {\begin{array}{*{20}{c}}{\left| x \right| + \left[ x \right],}&{ - 1 \le x < 1}\\{x + \left| x \right|,}&{1 \le x < 2}\\{x + \left[ x \right],}&{2 \le x \le 3}\end{array}} \right.\) where [t] denotes the greatest integer less than or equal to it. Then, f is discontinuous at:

Let f : [-1, 3] → R be defined as\(f\left( x \right) = \left\{ {\beg

1.	Let f : [-1, 3] → R be defined as\(f\left( x \right) = \left\{ {\begin{array}{*{20}{c}}{\left\| x \right\| + \left[ x \right],}&{ - 1 \le x < 1}\\{x + \left\| x \right\|,}&{1 \le x < 2}\\{x + \left[ x \right],}&{2 \le x \le 3}\end{array}} \right.\) where [t] denotes the greatest integer less than or equal to it. Then, f is discontinuous at:
A.	only one point
B.	only two points
C.	only three points
D.	four or more points
Answer» D. four or more points

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