Mathematics 9709 · AS & A Level · Differential equations

Differential equations — practice question

The variables $x$ and $y$ are linked by the differential equation $\dfrac{dy}{dx} = \frac{1}{5} x y^{\frac{1}{2}} \sin\!\left(\frac{1}{3}x\right)$.
(i)[6]

Determine the general solution, writing $y$ as a function of $x$.

(ii)[3]

When $y = 100$ at $x = 0$, determine the value of $y$ when $x = 25$.

Worked solution & mark scheme

This 9-mark question has a full step-by-step worked solution and mark scheme. One marking point: Separate the variables and start integrating at least one side

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