Name
_________________ SHW21: DE's,
Slope Fields, and Euler's Method
Problem 1.
Consider the differential equation given by .
(a) On the
axes provided below, sketch a slope field for the given differential
equation at the nine points indicated.
(b) Let y =
f(x) be the particular solution to the given differential equation with
the initial condition f(0) = 3. Use Euler's method starting at x = 0,
with a step size of 0.1 to approximate f(0.2). Show the work that leads
to your answer.
(c) Find
the particular solution y = f(x) to the given differential
equation with the initial condition f(0) = 3. Use your solution
to find f(0.2).
Problem 2.
Consider the differential equation given by .
(a) On the
axes provided below, sketch a slope field for the given differential
equation at the eleven points indicated.
(b) Use the
slope field for the given differential equation to explain why a
solution could not have the graph shown below.
(c) Find
the particular solution y = f(x) to the given differential
equation with the initial condition f(0) = -1.
(d) Find
the range of the solution found in part (c).
Problem 3.
Consider the differential equation given by .
(a) The
slope field for the given differential equation is provided below.
Sketch the solution curve that passes through the point [0, 1] and
sketch the solution curve that passes through the point [0, -1]
.
(b) Let f
be the function that satisfies the given differential equation with the
initial condition f(0) = -1. Use Euler's method starting at x = 0, with
a step size of 0.1 to approximate f(0.2). Show the work that leads to
your answer.
(c) Find
the value of b for which
is
a solution to the given differential equation. Justify your answer.
(d) Let g
be the function that satisfies the given differential equation with the
initial condition g(0) = 0. Does the graph of g have a local extremum
at the point [0, 0]? If so, is the point a local maximum or a
local
minimum? Justify your answer.