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Differential Equations: An Introduction to Modern Methods and Applications
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- Suppose an object weighing 64 pounds stretches a spring 8 feet. If the object is attached to the spring and released 5 feet below the equilibrium position from rest, find the equation of motion of the object x(t).arrow_forwardItem 7. Show that the given equation is an accurate equation and find the general solution of the equation (5x+ y* )dx+ y(2x–y²)dy = 0arrow_forwardQuestion 7 Find where y is defined implicitly by the equation dy da x4 -5x2y7 8 dy 5y7 10y-47 35zy® dy 8 10y7 412 35rys dr Question 8 enovoarrow_forward
- 4. A car supported by a MacPherson strut (shock absorber system) travels on a bumpy road at a constant velocity v. The equation modeling the motion of the car is Tut 80x + 1000x = 2500 cos where r = x (t) represents the vertical position of the cars axle relative to its equilib- rium position, and the basic units of measurement are feet and feet per second (this is actually just an example of a forced, un-damped harmonic oscillator, if that is any help). The constant numbers above are related to the characteristics of the car and the strut. Note that the coefficient of time t (inside the cosine) in the forcing term on the right hand side is a frequency, which in this case is directly proportional to the velocity v of the car. (a) Find the general solution to this nonhomogeneous ODE. Note that your answer will have a term in it which is a function of v.arrow_forwardClassify each of the following equations as linear or nonlinear (explain you're the reason). If the equation is linear, determine further whether it is homogeneous or nonhomogeneous. a. (cosx)y"-siny'+(sinx)y-cos x=0 b. 8ty"-6t²y'+4ty-3t²-0 c. sin(x²)y"-(cosx)y'+x²y = y'-3 d. y"+5xy'-3y = cosy 2. Verify using the principle of Superposition that the following pairs of functions y₁(x) and y2(x) are solutions to the corresponding differential equation. a. e-2x and e-3x y" + 5y' +6y=0 3. Determine whether the following pairs of functions are linearly dependent or linearly independent. a. fi(x) = ex and f(x) = 3e³x b. fi(x) ex and f2 (x) = 3e* 4. If y(x)=e³x and y2(x)=xe³x are solutions to y" - 6y' +9y = 0, what is the general solution? Question 1. Classify each of the following equations as linear or nonlinear (explain you're the reason). If the equation is linear, determine further whether it is homogeneous or nonhomogeneous. a. (cosx)y"-siny'+(sinx)y-cos…arrow_forwardA Moving to another question will save this response. Question 12 Find the solution of x²y" + xy-4y=0 where y(1) = 0 and y (1) = 4arrow_forward
- Solve the following D.E : 9y"-12 y'+ 4y =0arrow_forwardThe motion of a particle is defined by the following equations: dx/dt = x-2y and dy/dt = 5x-y with x(0) = 2 and y(0) = -1 Find x(t) and y(t) If x(t) and y(t) are periodic, find their amplitudes and periods Which of the attached graphs represents the motion? (Circle answer) A B Neitherarrow_forwardProblem 2: Solve the following IVP: 5x+1 7y (Note: y must be a function, so no plus/minus + allowed. Choose the sign that matches the initial condition.) dy dx ) y(-7)= −1arrow_forward
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