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Let f(x)={8^(1/x),x<0a[x],a in R-{0},xg...

Let `f(x)={8^(1/x),x<0a[x],a in R-{0},xgeq0,` (where [.] denotes the greatest integer function). Then (a) `f(x)` is Continuous only at a finite number of points (b)Discontinuous at a finite number of points. (c)Discontinuous at an infinite number of points. (d)Discontinuous at `x=0`

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