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September 16, 2020 6:23 ampts 30 pts
749. Let f (r) be the function defined on the intervral (0,1) by if r is rational, -r otherwise. Then f is continuous (A) at no point in (0, 1); (B) at exactly one point in (0,1); (C) at more than one, but finitely many points in (0,1); (D) at infinitely many points in (0,1).
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  • Deepak singh Best Answer
    see attached solution
    • cropped4016275852058123877.jpg
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  • Deepak singh thankyou
    option b is correct, if any doubt then ask
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