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Homogeneous & Linear Differential Equations · Question 37 of 120

Question 37

MediumOriginal question

Read the two statements and choose the correct option.

I. After y=vxy = vx, a homogeneous equation becomes xdvdx=F(v)−vx\frac{dv}{dx} = F(v) - v.

II. The solution of a homogeneous equation is always a straight line through the origin.

Options for question 37

Show the answer and explanation
CorrectNot quiteAnswer A

Correct answer: A

Explanation

  1. I: v+xdvdx=F(v)v + x\frac{dv}{dx} = F(v), rearranged. True.

  2. II: y=xlog⁡∣x∣+Cxy = x\log\lvert x \rvert + Cx, the solution of dydx=x+yx\frac{dy}{dx} = \frac{x + y}{x}, is no line. False.

Concept
What the substitution gives
Typical time
90 s
Your time
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The rule this testsSolving homogeneous equations
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Ten questions from Homogeneous & Linear Differential Equations, at your own pace.

Practise this chapter →

Ten questions from Homogeneous & Linear Differential Equations, at your own pace.