Consider the function f(x, y) = 3+xy−x−2y. Let D be the closed
triangular region with vertices...
Consider the function f(x, y) = 3+xy−x−2y. Let D be the closed
triangular region with vertices (1, 4), (5, 0), and (1, 0). Find
the absolute maximum and the absolute minimum of f on D.
Consider the function f(x,y) = e^xy and closed triangular region
D with vertices (2,0), (0,2) an (0,-2). Find the absolute maximum
and minimum values of f on this region.
Need an explanation pls
Let f(x, y) = 2x^3 − 6xy + 3y^2 be a function defined on
xy-plane
(a) Find first and second partial derivatives of.
(b) Determine the local extreme points of f (max., min., saddle
points) if there are any.
(c) Find the absolute max. and absolute min. values of f over
the closed region bounded by the lines x = 2, y = 0, and y = x
Let f(x, y) =x^2+ 3y^2−2x−12y+ 13 on the domain A given by the
triangular region with vertices (0,0),(0,6), and (2,0).
Find the maximum of f on the boundary of A.
3. Let Y be a singleobservation from a population with density
function.
f(y)= 2y/θ2 0 ≤ y ≤ θ
f(y)= 0 elsewhere
(a) Find the MLE for θ.
(b) Is the MLE found in (a) also a MVUE of θ? Justify your
answer.
(c) Show that Y/ θis a pivotal quantity for θ.
(d) Use the pivotal Y /θ to find a 100(1 − α)% upper confidence
interval for θ, which is of form (−∞, θˆU ).
For the following questions, suppose for...
Let ∬[a,b]×[c,d]f(x,y)dA denote the integral of f(x,y)over the
region with a≤x≤b and c≤y≤d. Find ∬[0,1]×[0,1]f(x,y)dA given the
following: ∬[0,1]×[1,5]f(x,y)dA=2, ∬[1,2]×[0,1]f(x,y)dA=−1,
∬[1,2]×[1,5]f(x,y)dA=4, and ∬[0,2]×[0,5]f(x,y)dA=3.
Group of answer choices
2
-2
8
0
None of the above.
Consider a Cauchy-Euler equation x^2y''- xy' +y =x^3 for
x>0.
a) Rewrite the equation as constant- coefficeint equation by
substituting x = e^t.
b) Solve it when x(1)=0, x'(1)=1.
How to transform x^2+xy+y^2+4x+2y=0 into the standard for of an
ellipse and finding the vertices of both major and minor axis. Plot
points and graph the ellipse.
Consider the production function Q = f(x,y) = xy^2.
(a) Totally differentiate this production function.
(b) While holding output constant, solve for dy/dx. What is the
economic interpretation of this term?
(c) Differentiate once more with respect to x solve for d
dx(dy/dx). What is the economic interpretation of this term?
(d) Evaluate the marginal products. Are they positive?
Diminishing?
(e) Evaluate the convexity of isoquant. Does it or does it not
contradict with the properties found in previous part?...
Let f(x, y) = xy3 − x 2 + 2y − 1. (a) Find the gradient vector
of f(x, y) at the point (2, 1).
(b) Find the directional derivative of f(x, y) at the point (2,
1) in the direction of ~u = 1 √ 10 (3i + j).
(c) Find the directional derivative of f(x, y) at point (2, 1)
in the direction of ~v = 3i + 2j.