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A function f (x) is defined as follows: ...

A function f (x) is defined as follows:
`{{:(5+2x,"for"-(5)/(2)lexlt0),(5-2x,"for "0lexlt(5)/(2)),(-5-2x,"for "xge(5)/(2)):}`
Show that f (x) is continuous at x =0 and discontinuous at `x=(5)/(2)` .

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