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Multiple Choice
State the order of the differential equation and indicate if it is linear or nonlinear.
A
order, linear
B
2nd order, nonlinear
C
order, nonlinear
D
3rd order, linear
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1
Identify the highest derivative present in the given differential equation. The equation is \( \frac{d^2y}{dx^2} - \left(\frac{dy}{dx}\right)(1-x) = 2 \). The highest derivative is \( \frac{d^2y}{dx^2} \), which is the second derivative. Therefore, the order of the differential equation is 2.
Determine if the equation is linear or nonlinear. A differential equation is linear if the dependent variable (in this case, \( y \)) and all its derivatives appear to the first power and are not multiplied by each other. In this equation, \( \frac{d^2y}{dx^2} \) and \( \frac{dy}{dx} \) appear to the first power, and there are no products of \( y \) or its derivatives. Thus, the equation is linear.
Summarize the findings: The differential equation is of the second order and is linear.
Compare the findings with the provided answer choices. The correct answer is '2nd order, linear.'
Conclude that the equation satisfies the criteria for being a second-order linear differential equation.