(d) Translate the following statement into predicate logic: “Every function f :R → R can be...
3. (10 points) Let F denote the vector space of functions f: R + R over the field R. Consider the functions fi, f2. f3 E F given by f1(x) = 24/3, f2() = 2x In(9), f() = 37*+42 Determine whether {f1, f2, f3} is linearly dependent or linearly independent, and provide a proof of your answer.
Formal Definitions of Big-Oh, Big-Theta and Big-Omega: 1. Use the formal definition of Big-Oh to prove that if f(n) is a decreasing function, then f(n) = 0(1). A decreasing function is one in which f(x1) f(r2) if and only if xi 5 r2. You may assume that f(n) is positive evervwhere Hint: drawing a picture might make the proof for this problem more obvious 2. Use the formal definition of Big-Oh to prove that if f(n) = 0(g(n)) and g(n)...
Let g: R→R be a polynomial function of even degree and let B={g(x) ER) be the range of g. Define g such that it has at least two terms. 1. Using the properties and definitions of the real number system, and in particular the definition of infimum, construct a formal proof showing inf(B) exists OR explain why B does not have an infimum. 2. Using the properties and definitions of the real number system, and in particular the definition of...
be a coordinate function for 1.) (Coordinate functions) Let f: R a (a) (Exercise 3A) Prove that -f is a coordinate function as well. (5 (b) For which real numbers a, b e R is a f+b a coordinate function? (c) Let g:E → R be a coordinate function. Prove that there exists a line ( points) Justify your answer with a proof. (10 points) real number b E R, such that g-f+b or gf+b. (10 points)
Let g: R→R be a polynomial function of even degree and let B={g(x)|x ∈R} be the range of g. Define g such that it has AT LEAST TWO TERMS G(x) - 1 - 3x^2 1. Using the properties and definitions of the real number system, and in particular the definition of supremum, construct a formal proof showing inf(B) exists OR explain why B does not have an supremum.
Warm-Up: Subgradients & More (15 pts) 1. Recall that a function f:R" + R is convex if for all 2, Y ER" and le (0,1), \f (2) + (1 - 1)f(y) = f(2x + (1 - 1)y). Using this definition, show that (a) f(3) = wfi (2) is a convex function for x ER" whenever fi: R → R is a convex function and w > 0 (b) f(x) = f1(x) + f2(2) is a convex function for x ER"...
1. If fand g are both even functions, is the product fg even? If f and g both odd functions, is fg odd? What if f is even and g is odd? Justify your answers. (10 points) Find the domain g(x) =-. (10 points) 2. of the composited function fog, where f(x)=x+ and x +1 x+2 3. Let ifx <1 g(x) = x-3 ifx >2 Evaluate each of the following, if it exists. (10 points) lim g(x) lim gx)(i) lim...
6. (Extra Credit) Let I be the interval (0,1). Define F(I) = {f:I+I:f is a function}, the set of all functions from the interval (0,1) to itself. (a) Thinking about the graph of a function, define a one-to-one function F(1) ► PIXI). Prove your function is one-to-one (remember that functions fi and f2 are equal when they have the same domain and codomain, and fi(x) = f2(x) for every x in the domain). (b) Given a set A CI, define...
Example 8.5.1. Let if 0< x< T if 0 or r? -1 if -т <т < 0. 1 f(x)= 0 _ The fact that f is an odd function (i.e., f(-x) = -f(x)) means we can avoid doing any integrals for the moment and just appeal to a symmetry argument to conclude T f (x) cos(nar)dx 0 and an f(x)dax = 0 ao -- T 27T -T for all n 1. We can also simplify the integral for bn by...
(Limit of functions) Let f : 2-» C be a function, and assume that D(a, r) C Q. We say that lim f(z) L Ď(a, 6) we have |f(z) Ll < e. if for any e > 0 there exists 6 > 0, such that for any z e (a) State the negation of the assertion "lim^-,a f(z) = L". (b) Show that lim- f(z) L if and only if for any sequence zn -» a, with zn a for...