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Discuss the continuity of f(x)=[tan^(-1)...

Discuss the continuity of `f(x)=[tan^(-1)x]`

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We know `y=tan^(-1)x` could be plotted as,

Thus, `f(x)=[tan^(-1)x]` could be plotted as,

`therefore` f(x) is not continuous when `x in {-tan 1, 0, tan 1}`
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