AP Calculus ABmediummcq1 pt

The slope field for a differential equation is shown, and the solution curve passing through (0,1)(0,1) is drawn. What is the value of dydx\dfrac{dy}{dx} at the point (1,2)(1,2) if that point also lies on the drawn curve and the differential equation is dydx=xy+1\dfrac{dy}{dx} = \dfrac{x}{y+1}?

A.13\dfrac{1}{3}
B.12\dfrac{1}{2}
C.33
D.23\dfrac{2}{3}

Explanation

Core Concept

Substituting x=1x=1 and y=2y=2 gives 12+1=13\dfrac{1}{2+1} = \dfrac{1}{3}, the slope of the curve at that point.

Correct Answer

A13\dfrac{1}{3}

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