2. For the system ) = (", 3) is a solution. Its initial position is we claim that the curve Y(t) Y0) = (1,3). (a) Check that Y(t) = (e, 3e) is a solution. (b) Use Euler's method with step size At = 0.5 to approximate this solution, and check how close the approximate solution is to the real solution when t = 2, 1 = 4, and i = 6.

Advanced Engineering Mathematics
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Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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Problem 2. 

Only (a.) and (b.) please

EXERCISES FOR SECTION 2.5
1. For the system
dx
-y
the curve Y(1) = (cos t, sint) is a solution. This solution is periodic. Its initial
position is Y(0) = (1,0), and it returns to this position when t = 2r. So Y(2r) =
(1,0) and Y(t + 27) = Y(t) for all t.
(a) Check that Y(1) = (cost, sin f) is a solution.
(b) Use Euler's method with step size 0.5 to approximate this solution, and check
how close the approximate solution is to the real solution when t = 4, t = 6,
and t = 10.
(c) Use Euler's method with step size 0.1 to approximate this solution, and check
how close the approximate solution is to the real solution when t = 4, 1 = 6,
and t = 10.
(d) The points on the solution curve Y(1) are all 1 unit distance from the origin.
Is this true of the approximate solutions? Are they too far from the origin or
too close to it? What will happen for other step sizes (that is, will approximate
solutions formed with other step sizes be too far or too close to the origin)?
[Use a computer or calculator to perform Euler's method.)
2. For the system
2x
di
= y,
(e", 3d) is a solution. Its initial position is
we claim that the curve Y(1) =
Y(0) = (1,3).
(a) Check that Y(t) = (e", 3e') is a solution.
(b) Use Euler's method with step size At = 0.5 to approximate this solution, and
check how close the approximate solution is to the real solution when t = 2,
1 = 4, and i = 6.
Transcribed Image Text:EXERCISES FOR SECTION 2.5 1. For the system dx -y the curve Y(1) = (cos t, sint) is a solution. This solution is periodic. Its initial position is Y(0) = (1,0), and it returns to this position when t = 2r. So Y(2r) = (1,0) and Y(t + 27) = Y(t) for all t. (a) Check that Y(1) = (cost, sin f) is a solution. (b) Use Euler's method with step size 0.5 to approximate this solution, and check how close the approximate solution is to the real solution when t = 4, t = 6, and t = 10. (c) Use Euler's method with step size 0.1 to approximate this solution, and check how close the approximate solution is to the real solution when t = 4, 1 = 6, and t = 10. (d) The points on the solution curve Y(1) are all 1 unit distance from the origin. Is this true of the approximate solutions? Are they too far from the origin or too close to it? What will happen for other step sizes (that is, will approximate solutions formed with other step sizes be too far or too close to the origin)? [Use a computer or calculator to perform Euler's method.) 2. For the system 2x di = y, (e", 3d) is a solution. Its initial position is we claim that the curve Y(1) = Y(0) = (1,3). (a) Check that Y(t) = (e", 3e') is a solution. (b) Use Euler's method with step size At = 0.5 to approximate this solution, and check how close the approximate solution is to the real solution when t = 2, 1 = 4, and i = 6.
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