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Show that f is continuous on (-infinity, infinity).

f(x) = x^2 if x<1 and the square root of x if x is greater than or equal to 1.

I'm not entirely sure how to start this. Help is greatly appreciated :)

  • Calculus -

    f(1) = 1
    For x<1, the function approaches 1 as x->1 from below.
    Therefore the function is continuous at x=1. It is also defined and continuous for x>1 and x<1.
    Therefore it is continuous on (-infinity, infinity)

  • Calculus -

    Many thanks!

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