f(x) is O(g(x)) if and only if g(x) is Ω(f(x)).
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Show that if f(x) and g(x) are functions from the set of real numbers to the set of real numbers, then f(x) is O(g(x)) if and only if g(x) is Ω(f(x)).
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- Define a function S: Z+ → Z+ as follows. For each positive integer n, S(n) = the sum of the positive divisors of n. 1.) S(13) = 2.)S (5) =Let N = {0, 1, 2, . . .} be the set of Natural Numbers. Given an n ∈ N, which of the followingconditions are necessary, and which of these conditions are sufficient, for the Natural Number,n, to be a factor of 10.(a) 1 is a factor of n.(b) 1 is a factor of 2n.(c) −n is a factor of 10.(d) 10 is a multiple of n.(e) n is divisible by 2.(f) n^2 is divisible of 5.(g) n = 10.Given g = {(1,c),(2,a),(3,d)}, a function from X = {1,2,3} to Y = {a,b,c,d}, and f = {(a,r),(b,p),(c,δ),(d,r)}, a function from Y to Z = {p, β, r, δ}, write f o g as a set of ordered pairs.
- For each set of cubes in terms of variables (a, b, c, d] obtain the minimized version for boolean fuction f(a, b, c, d) (00X1, 0XX1, 1000, 1100, 1010, 1110} {1XX0, 10XX, 11XX, 00XX} ✓ {00XX, 01XX, 0XXX, 01X1} (0100, 1010, 1XX1, XXXX, 0001} {0001, 0011, 0101, 0111, 1101, 1111, 1001, 1011} ✓ {000X, 010X, 1X00, 1X01} A f(a, b, c, d) = 1 B. f(a, b, c, d) = d C. f(a, b, c, d) = ē D. f(a, b, c, d) = a + a b Ef(a, b, c, d) = a F. f(a, b, c, d) = a dProve: Let a, b, and c be integers. If (a - b) | c, then a | c. bk Suppose a, b, c are integers with (a b) | c. Then c = .). (² X . (a. b) for some integer k, so c = (alel X a, so a c.1. Let f(n) and g(n) be asymptotically positive functions. Prove or disprove the follow- ing conjectures: (a) f(n) + g(n) = 0(min(f(n), g(n))). (b) f(n) + w(f(n)) = ©(f(n)).