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Consider the relation on X = Z × N + given by (a, b) ≈ (c, d) if and only if ad = bc. (As proved in the homework, this is an equivalence relation.) Consider the operation ∗ : X × X → X (x, y) ∗ (z, w) = (xw + yz, yw). Show that this gives a well-defined map ∗ : X/≈×X/≈ → X/≈ on the equivalence classes. (Warning: For full credit, your proof should not make use of the rational numbers. This means that (assuming x, y, z ∈ Z) you may use the fact that if xy = xz and x 6= 0 then y = z, but your solution should avoid arithmetic with rational numbers.)
Use the graph to find critical points. Label these points on your graph. Apply the extreme value theorem to find the absolute extrema of f(x) on the closed interval , [-1.5, 1.5]
Determine whether the series is convergent or divergent: 9/(n(n+2)) from n=1 to infinity.
Prove the proposition. Let X be a metric space and Y be a submetric space of X. If Y is complete, then Y is closed in X. Conversely, if Y is closed in X and X is complete, then Y is complete.
Center of Mass of 3D Pyramid, Finding the center of mass of a square-based 3D pyramid is usually done in calculus, but our professor wants us to work it out in algebra.
Determine how many tickets should be sold for a flight on an airplane which has 400 seats, such that with probability 0.95 everybody who appears for the departure of theflight will have a seat. what assumption are you making.
Find the number of pitchers that she should produce and the price she should charge in order to maximize profit. Also find the maximum profit.
A grain silo has a cylindrical shape. Its diameter is16FT , and its height is 47FT . What is the volume of grain that can be stored in the silo?
What is the formula for the volume of a rectangular solid? Find an object in your residence that has the shape of a rectangular solid. Measure and record the length, width, and height of your object in either centimeters
A small company has 10 employees that receive a monthly paycheck and you calculate the mean and standard deviation for the paychecks in December. For the holiday, the president decides to give everyone a $500 raise. How would the mean and standard..
Derive the Euler-Lagrange Differential Equation (rigorously). Explain any theorems or results that you use in the derivation (e.g. don't just say "by the fundamental theorem of the calculus of variations" without telling what the fundamental theor..
Suppose Frank owns 8,000 shares of Company X and 6,000 shares of Company Y. The total value of Franks holdings of these two companies is $400,000.
Lauren plans to deposit $3000 into a bank account at the beginning of next month and $250/month into the same account at the end of that month and at the end of each subsequent month for the next 7 yr.
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