Find the integral of ((2(7x^(2)-xe^(-2x))-5)/x) . Given that y=27 at x=1, solve the differential equation dy/dx=((2(7x^(2)-xe^(-2x))-5)/-3x).y^(2/3) in terms of y.

Part A)Expand numerator in the integral to get 14x^(2) - 2xe^(-2x)-5Now divide by denominator to get 14x - 2e^(-2x) - 5/xNow integrate to get 7x^(2) + e^(-2x) - 5ln(x)Part B)Get all components of y on the left, and all components of x on the right to get -3⌠ y^(-2/3) dy = ⌠ ((2(7x^(2)-xe^(-2x))-5)/x) dx ⌡ ⌡ 3. solve to get -9y^(1/3) = 7x^(2) + e^(-2x) - 5ln(x) + C 4. Now substitute given values of x and y (1 and 27 respectively), in order to calculate C -27 = 7 + e^(-2) - 0 + c C = -34-e^(-2) 5. Substituting in C we get -9y^(1/3) = 7x^(2) + e^(-2x) - 5ln(x) + (-34-e^(-2)) 6. Rearranging in terms of y we get y = (-1/729).(7x^(2) + e^(-2x) - 5ln(x) - 34 - e^(-2))^(3)

GR
Answered by George R. Maths tutor

4303 Views

See similar Maths A Level tutors

Related Maths A Level answers

All answers ▸

What is the chain rule?


Use the substitution u=x^2-2 to find the integral of (6x^3+4x)/sqrt( x^2-2)


Find the turning point of y = x + 1 + 4/x2 and describe the nature of the turning point


if f(x) = 7x-1 and g(x) = 4/(x-2), solve fg(x) = x


We're here to help

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

MyTutor is part of the IXL family of brands:

© 2026 by IXL Learning