Mathematics 9709 · AS & A Level · Integration

Integration — practice question

The diagram displays the straight line $x + y = 5$ crossing the curve $y = \frac{4}{x}$ at the points $A(1, 4)$ and $B(4, 1)$.
(main)[7]

Find, showing all necessary working, the volume produced when the shaded region is rotated through $360^\circ$ about the $x$-axis.

Worked solution & mark scheme

This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: Applies the volume formula $V=\pi\int((5-x)^2-\frac{16}{x^2})dx$

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