1. Consider the function f: R→R, where R represents the set of
all real numbers and for every x ϵ R, f(x) = x3. Which of the
following statements is true?
a. f is onto but not one-to-one.
b. f is one-to-one but not onto.
c. f is neither one-to-one nor onto.
d. f is one-to-one and onto.
2. Consider the function g: Z→ {0, 1, 2, 3, 4, 5}, where Z
represents the set of all integers and for...
Show that W = {f : R → R : f(1) = 0} together with usual
addition and scalar multiplication forms a vector space. Let g : R
→ R and define T : W → W by T(f) = gf. Show that T is a linear
transformation.
Suppose a function f : R → R is continuous with f(0) = 1. Show
that if there is a positive number x0 for which
f(x0) = 0, then there is a smallest positive number p
for which f(p) = 0. (Hint: Consider the set {x | x > 0, f(x) =
0}.)
Consider the differential equation x′=[2 4
-2 −2],
with x(0)=[1 1]
Solve the differential equation where x=[x(t)y(t)].
x(t)=
y(t)=
please be as clear as possible especially when solving for c1
and c2 that's the part i need help the most
Given that x =0 is a regular singular point of the given
differential equation, show that the indicial roots of the
singularity differ by an integer. Use the method of Frobenius to
obtain at least one series solution about x = 0.
xy"+(1-x)y'-y=0
5. Consider the differential equation
xy^5/2 +1+x^2y^3/2dy/dx =0
(a) Show that this differential equation is not exact.
(b) Find a value for the constant a such that, when you multiply
the d.e. through by xa, it becomes exact. Show your working. Do NOT
solve the resulting differential equation.
6. Consider the differential equation
(D − 3)(D − 4)y = 0.
(a) Solve this d.e., showing brief working.
(b) How many solutions does this d.e. have? Justify your
answer.
(c) How...
Let f (x) = ex - 4x2
a) Show that equation f (x) = 0 has three real solutions.
b) Use the Newton Method to calculate the largest of the solutions
with precision.
preset of 0.01.