Question #277396

(x^3 - x)dy/dx - (3x^2 - 1)y = x^5 - 2x^3 + x , y(1) = 1


Expert's answer

y′−3x2−1x3−xy=x4x2−1−2x2x2−1+1x2−1y'-\dfrac{3x^2-1}{x^3-x}y=\dfrac{x^4}{x^2-1}-\dfrac{2x^2}{x^2-1}+\dfrac{1}{x^2-1}

Integrating factor


μ(x)=e−∫3x2−1x3−xdx=1x3−x\mu(x)=e^{-\int\tfrac{3x^2-1}{x^3-x}dx}=\dfrac{1}{x^3-x}

1x3−xy′−3x2−1(x3−x)2y\dfrac{1}{x^3-x}y'-\dfrac{3x^2-1}{(x^3-x)^2}y

=x3(x2−1)2−2x(x2−1)2+1x(x2−1)2=\dfrac{x^3}{(x^2-1)^2}-\dfrac{2x}{(x^2-1)^2}+\dfrac{1}{x(x^2-1)^2}

(1x3−xy)′=x4−2x2+1x(x2−1)2(\dfrac{1}{x^3-x}y)'=\dfrac{x^4-2x^2+1}{x(x^2-1)^2}

(1x3−xy)′=(x2−1)2x(x2−1)2(\dfrac{1}{x^3-x}y)'=\dfrac{(x^2-1)^2}{x(x^2-1)^2}

(1x3−xy)′=1x(\dfrac{1}{x^3-x}y)'=\dfrac{1}{x}

Integrate


1x3−xy=∫1xdx\dfrac{1}{x^3-x}y=\int \dfrac{1}{x}dx

1x3−xy=ln⁡(∣x∣)+c1\dfrac{1}{x^3-x}y=\ln (|x|)+c_1

y=(x3−x)ln⁡(x)+c1(x3−x)y=(x^3-x)\ln (x)+c_1(x^3-x)



y(1)=1y(1) = 1


1=(1−1)(0)+c1(1−1)1=(1-1)(0)+c_1(1-1)

1=0,False1=0, False

Therefore the given IVP does not have solution.


LATEST TUTORIALS
APPROVED BY CLIENTS