Let y(t) be a solution of y˙=17y(1−y7) such that y(0)=14y(0)=14. Determine limt→∞y(t)limt→∞y(t) without finding y(t) explicitly.
Let y(t) be a solution of y˙=17y(1−y7) such that y(0)=14y(0)=14. Determine limt→∞y(t)limt→∞y(t) without finding y(t) explicitly.
Homework Answers
Use diorection field for finding the limit, what we require as follows.
from the above sketch, the limit of the particular solution is7.
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we can check the above result algebraically as follows.
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Let y(t) be a solution of y˙=17y(1−y7) such that y(0)=14y(0)=14.
Determine limt→∞y(t)limt→∞y(t) without finding y(t) explicitly.
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Let y(t)y(t) be a solution of y˙=1/4y(1−y4) such that
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Let y(t) be a solution of y˙=(1/5)y(1−y/5) such that y(0)=10 . Determine limt→∞y(t) without finding y(t) explicitly. limt→∞y(t) =
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(5 points) Find the general solution to the differential equation y" – 2y + 17y=0. In your answer, use Cį and C2 to denote arbitrary constants and t the independent variable. Enter Cų as C1 and C2 as С2. y(t) = help (formulas) Find the unique solution that satisfies the initial conditions: y(0) = -1, y'(0) = 7. y(t) =
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3. Draw the direction field of the following differential equation: = (1-y)y dt What happens for the solution satisfying y(0)-2, 1, 0.5,-1 as t-> oo? If y(2)-β and limt→oo y(t) = 1. Find all possible values of β.
3. Draw the direction field of the following differential equation: = (1-y)y dt What happens for the solution satisfying y(0)-2, 1, 0.5,-1 as t-> oo? If y(2)-β and limt→oo y(t) = 1. Find all possible values of β.
(1 point) Find the solution of y" + 14y +48 y = 24 e-St with y(0)...
(1 point) Find the solution of y" + 14y +48 y = 24 e-St with y(0) = 3 and y0) = 4. y =
Determine the equilibrium, classify each equilibrium, draw a phase line. If y(0)=1 then lim y(t) = ? If y(0)=2 then what is the solution y(t) =? 3/3-4y Let dt 3/3-4y Let dt
Determine the equilibrium, classify each equilibrium, draw a
phase line.
If y(0)=1 then lim y(t) = ?
If y(0)=2 then what is the solution y(t) =?
3/3-4y Let dt
3/3-4y Let dt
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Let T(1, 0) – (1, 0) and T(0, 1) – (0, 2). (a) Determine T(x, y) for any (x, y). (b) Give a geometric description of T. o vertical sheer O vertical contraction vertical expansion horizontal expansion horizontal sheer horizontal contraction
Problem 3. (1 point) Find y as a function of tif y" + 5y - 14y...
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Let y(t)y(t) be a solution of y˙=1/4y(1−y4) such that
y(0)=8.Determine limt→∞y(t) without finding y(t) explicitly.
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(1 point) Let y(t) be a solution of ý = {y(1 – 3) such that y0) = 10. Determine lim y(t) without finding y(t) explicitly. ta lim Vt) = 1. 100
(5 points) Find the general solution to the differential equation y" – 2y + 17y=0. In your answer, use Cį and C2 to denote arbitrary constants and t the independent variable. Enter Cų as C1 and C2 as С2. y(t) = help (formulas) Find the unique solution that satisfies the initial conditions: y(0) = -1, y'(0) = 7. y(t) =
3. Draw the direction field of the following differential equation: = (1-y)y dt What happens for the solution satisfying y(0)-2, 1, 0.5,-1 as t-> oo? If y(2)-β and limt→oo y(t) = 1. Find all possible values of β.
3. Draw the direction field of the following differential equation: = (1-y)y dt What happens for the solution satisfying y(0)-2, 1, 0.5,-1 as t-> oo? If y(2)-β and limt→oo y(t) = 1. Find all possible values of β.
(1 point) Find the solution of y" + 14y +48 y = 24 e-St with y(0) = 3 and y0) = 4. y =
Determine the equilibrium, classify each equilibrium, draw a
phase line.
If y(0)=1 then lim y(t) = ?
If y(0)=2 then what is the solution y(t) =?
3/3-4y Let dt
3/3-4y Let dt
Let T(1, 0) – (1, 0) and T(0, 1) – (0, 2). (a) Determine T(x, y) for any (x, y). (b) Give a geometric description of T. o vertical sheer O vertical contraction vertical expansion horizontal expansion horizontal sheer horizontal contraction
Problem 3. (1 point) Find y as a function of tif y" + 5y - 14y = 0, y(0) = 5, y(1) = 6, y) = Remark: The initial conditions involve values at two points. Problem 4. (1 point) Find the solution to the linear system of differential equations 8x - 15y 6x-lly satisfying the initial conditions x(0) = -16 and yo) = -10 x(t) = Note: You can earn partial credit on this problem
(b) Let X(ju) denote the Fourier transform of the signal r(t) shown in the figure x(t) 2 -2 1 2 Using the properties of the Fourier transform (and without explicitly evaluating X(jw)), ii. (5 pts) Find2X(jw)dw. Hint: Apply the definition of the inverse Fourier transform formula, and you can also recall the time shift property for Fourier Transform. (c) (5 pts) Fourier Series. Consider the periodic signal r(t) below: 1 x(t) 1 -2 ·1/4 Transform r(t) into its Fourier Series...
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