Roots of Polynomial for a Derivative

An elliptic curve can be written as y^2=x^3+ax+b. I need a proof for why x^3+ax+b either have 3 real roots or 1 real root and 2 complex roots. I don't have anything that I know about it prior to asking for help here at Brainmass.

Calculus Maxima, Minima and Saddle Points

Show all work 1. Determine the exact value for each of the following limits: a. b. 2. Determine derivatives (with respect to x) for the following: a. b. c. d. Determine for e. Determine the partial derivative with respect to x for 3. Integrate the following: a. b...

Math Homework

MATH 141 Homework Due Dec 2 Name : Solve the following linear programming problem using a graphical method A company makes two puddings, vanilla and chocolate. Each serving of vanilla pudding requires 2 teaspoons of sugar and 25 fluid ounces of ...

Value of each definite integral

Name __________________________ Math 331 Fall 2015 DIRECTIONS: Show as much work as possible within each question as I grade on both the process and the final answer. TI-89's are wonderful calculators, but they don't show me if you know anything about calculus! Show all work. 1. (6 pts eac...

Trigonometric equations and angle between vectors.

Question #1: You used Pythagorus' theorem to determine whether or not a triangle was a right triangle. The sides of the triangle are: a = sqrt(416), b = sqrt(601), and c = sqrt(1009) so that a2 + b2 did not equal c2. Thus it is not a right triangle. Let the α, β, γ be the angles of the tria...

The Simplex Method

In the simplex method, how is a pivot column selected? A pivot row? A pivot element? Give an example of all three and define the simplex method.

Period of a Fraction

From what I have seen, the longest length of a repeating sequence for an irrational number is c-1 for a=b/c. This occurs when c is a prime. How does one prove this? Can you give mathematical proof for this? Here is a link to the problem being discussed: http://boards.straightdope.com/sdmb/showth...

Differential and difference equation

Please help with the following problem, providing step by step calculations in the solution. Solve the differential equation subject to y(0)=2. An Euler approximation to y(x)=2. An Euler approximation to y(x) is given by setting h=x/h, solving the difference equation: See attached file for eq...

Calculus: Graph the Function f

Graph the function ƒ(x) = x3 - 4x + 2. Let ƒ represent the position of an object with respect to time that is moving along a line. Identify when the object is moving in the positive and negative directions and when the object is at rest, showing all work.

Application of L'Hopital's Rule

Task: Graph the f(x) = e^2x - 1/x Verify the Limit x→0 f(x) meets the criteria for applying L'Hopital's Rule Find the Limit x→0 f(x) Explain why L'Hopital's Rule cannot be used to find the limit of Lim x→0 e^2x/x

Prove Compactness of a Closed Subset

Prove that any closed subset of compact metric space is compact by using Theorem 2. Theorem 2: A subset of S of a metric space X is compact if, and only if, every sequence in S has a subsequence that converges to a point in S.

Proving for Compactness and Convergence of Sequences

Prove that [0,1]^n is compact for any number (n e N) by using theorem 2. (see attached file) Theorem 2: A subset S of a metric space X is compact if, and only if, every sequence is S has a subsequence that converges to a point in S.

Algebra: fraction decomposition

I have been working on a general appraoch to partial fractions. And I wanted a proof for why the normal way of doing partial fractions always gives a consistent equation system for the constants in the partial fraction. Question is illustrated with an example and explained more in detail in the docu...

Calculating integrals with the trapezoidal method

Consider the integral in the attachment. Using the trapezoidal method with n = 4 and n = 8, estimate the integral numerically. Calculate the integral exactly and compare this with your numerical results. Please see attached and show step by step, thanks.

Line Integrals and Rectangles

Line Integrals Please see the attached. Please do the problem(s) in detail and show all work. This question requires a line integral around the rectangle defined by the points (1,-1), (1,1), -1,1), (-1,-1) and with the function given. This defines 4 integrals that have to be evaluated as describ...

Computing angular velocity of the wheels

I need help in answering this question: A car is traveling down a road at 50 miles per hour. The car runs out of gas and drives allows the car to coast to a halt in order to get as close to the nearest gas station as possible. The car travels another 2.3 miles before continue to a stop. a) find ...

Effects of Data Changes Using Least Squares Method

Watch: http://academicearth.org/lectures/least-squares and/or view: http://www.efunda.com/math/leastsquares/leastsquares.cfm Consider the following dataset: (20,525) (17,57) (10,19) (9,18) (7,14) (16,41) (3,5) (5,10) (10,23) (12,24) (9,15) (20,571) (18,102) (16,56). Calculate a best fit equ...

Maximizing enclosed volumes

An open topped box is constructed by removing a square from each corner of a flat piece of metal and folding up the resulting flaps. The piece of metal is 40 cm by 25 cm. What size square should be removed from each corner so as to maximize the enclosed volume of the box? What is that volume?

Complex number identities

Let z, w E C a) Prove the following identities: i) |z+w|^2 = |z|^2 + 2Re(zw) + |w|^2 ii) |z - w|^2 = |z|^2 - 2Re(zw) + |w|^2 b) Deduce that |z+w|^2 + |z-w|^2 = 2(|z|^2 + |w|^2). c) Use (a)(i) to prove that |z+w| < |z-| + |w| and give necessary conditions for equality to hold. d) Prov...

Finding Derivatives of Given Functions

Find the derivatives of the following functions: (i) f(x) = sqrt(x)*(2x^3-4) + 3x^(-1/4) (ii) y(x) = (x(x^2-1))/(x^3-4) (iii) g(u) = (4u^(1/3))*(sqrt(u^3+1)) Please see attached and show step by step, thanks.

Proving the Joule-Thomson Effect

I wonder how one can use a partial derivative with constrain slope dH= 0 in a general equation with two partial derivatives where dH=0 is not true. The problem is for the Joule-Thomson effect. The question is much better described in the attachment. This is a problem from chemistry but since it is j...

Assorted Calculus Questions

Below are the graphs of four functions. Which function is invertible? Set up the integral for the length of the smooth arc y = e x on [0, 10]. What is the area of the triangle bounded by the lines x = 1, y = x − 1, and y = 3 − x ? ...