Find the volume of revolution when the curve defined by y=xe^(2x) is rotated 2*pi radians about the x-axis between x=0 and x=1

This is a standard question that may be found in a C4 mathematics paper. Students should use knowledge of the volume of revolution formula V = piint_{a}^{b} y2dx to find the expression V = piint_{0}^{1} (x2e4x) dx.
Using the integration by parts formula (below), one can yield an intermediary equation, namely V = pi*[e4/4-(1/2)int_{0}^{1} (xe4x)]. Application of the integration by parts formula again solves the second integral of xe4x, and substituting in the limits of 0 and 1 yields a final answer of: (pi/32)(5e4-1).

Integration by parts formula: int(uv') = uv - int(u'v).

HS

Related Maths A Level answers

All answers ▸

Express (x+1)/2x + (2x+3)/(x+1) as one term


Find the gradient of the line with equation 2x + 5y = 7


Find the general solution, in degrees, of the equation 2 sin(3x+45°)= 1


Write tan(3x) in terms of tan(x). Hence show that the roots of t^3 - 3t^2 - 3t + 1 = 0 are tan(pi/12), tan(5pi/12) and tan(3pi/4)