(a) Use the Method of Undetermined Coefficients to solve the second order differential equation dy, dy dx² 6y = 2 sin(2x). dx

Advanced Engineering Mathematics
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Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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Question 5
(a) Use the Method of Undetermined Coefficients to solve the second order differential
equation
dy , dy
- 6y = 2 sin(2x).
dx?
dx
(b) A girl lives 6 km from school. She decides to travel to school so that her speed is
always proportional to the square of her distance from the school.
(i) Find her distance from school at any time. (Hint: Speed is the rate of change
of distance, so you will need to set up a differential equation subject to an
initial condition, and solve it.)
(ii) When does she reach school?
Transcribed Image Text:Question 5 (a) Use the Method of Undetermined Coefficients to solve the second order differential equation dy , dy - 6y = 2 sin(2x). dx? dx (b) A girl lives 6 km from school. She decides to travel to school so that her speed is always proportional to the square of her distance from the school. (i) Find her distance from school at any time. (Hint: Speed is the rate of change of distance, so you will need to set up a differential equation subject to an initial condition, and solve it.) (ii) When does she reach school?
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