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
Answered by Hanish S. Maths tutor

3161 Views

See similar Maths A Level tutors

Related Maths A Level answers

All answers ▸

Given that z = sin(x)/cos(x), use the quoitent rule to show that dZ/dx = sec^2(x)


Find the gradient of the exponential curve y(x)=(9e^(7x))/(12e^(2x)) at x=2/5


Factorise 6x^2 + 7x - 3=0


Use simultaneous equations to find the points where the following lines cross: 3x - y = 4 and x^2 + 7y = 5


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences