Question 1018

Definite Integrals: Areas and Volumes
2018 Paper 1 Question 2 Variant

Question

Do not use a calculator in answering this question.

A curve has equation y=3x{\displaystyle y = \frac{3}{x}} and a line has equation y+2x=7.{y + 2 x=7.} The curve and the line intersect at the points A{A} and B.{B.}

(i)
Find the x{x}-coordinates of A{A} and B.{B.}
[2]
(ii)
Find the exact volume generated when the area bounded by the curve and the line is rotated about the x-axis{x\textrm{-axis}} through 360.{360^\circ.}
[4]

Answer