The upper branch of the circle can be written as for

MATHEMATICS · Single correct · AP · Calculus AB · Analytical Applications of Differentiation · Analytical Applications of Differentiation

Problem

The upper branch of the circle x2+y2=10x^{2}+y^{2}=10 can be written as y=f(x)y=f(x) for −10<x<10-\sqrt{10}<x<\sqrt{10}. On which interval is ff increasing? (a) (0,10)(0,\sqrt{10}) (b) (−10,0)(-\sqrt{10},0) (c) (−10,10)(-\sqrt{10},\sqrt{10}) (d) (−∞,0)(-\infty,0)

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