Suppose f(x, y) = (x − y)(9 — xy). Answer the following. Each answer should be a list of points (a, b, c) separated by commas, or, if there are no points, the answer should be NONE. 1. Find the local maxima of f. Answer: none ⠀ 2. Find the local minima of f. Answer: none ⠀ 3. Find the saddle points of f. Answer: none
Permutations and Combinations
If there are 5 dishes, they can be relished in any order at a time. In permutation, it should be in a particular order. In combination, the order does not matter. Take 3 letters a, b, and c. The possible ways of pairing any two letters are ab, bc, ac, ba, cb and ca. It is in a particular order. So, this can be called the permutation of a, b, and c. But if the order does not matter then ab is the same as ba. Similarly, bc is the same as cb and ac is the same as ca. Here the list has ab, bc, and ac alone. This can be called the combination of a, b, and c.
Counting Theory
The fundamental counting principle is a rule that is used to count the total number of possible outcomes in a given situation.
21. One of the answers is not correct, I am not sure which one. Need help figuring out the correct answer for it.
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