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Find the intervals which proves that function is upward/increase.

a) f(x)=1-x2
b) f(x)=x2-2x

  • Math -

    f(x) is increasing if f'(x) > 0
    I'll do (a)

    f'(x) = -2x
    f'(x) > 0 when x < 0
    The graph is a parabola with vertex at (0,1) which opens downward.

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