1. Let X = {r1, X2, X3, L4} and let b : X × X → [0, 0) be symmetric with %3D b(x1,x2) = 3, b(r2, 13) = 1, b(x2, T4) = 2. Let c =0 and let m(x) = deg(x). Let f, g € C(X) be functions defined by f(21) = 1, f(x2) = 2, f(r3) = 3, f(¤4) = 4, and g(x1) = 0, g(x2) = -3, g(x3) = 4,g(x4) = –1. %3D %3D (a) Calculate the inner product (f,g), and norms || f|| and ||g|| in l²(X,m).

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter3: Functions And Graphs
Section3.5: Graphs Of Functions
Problem 52E
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1. Let X = {r1, x2, T3, 24} and let b: X x X → [0, 0) be symmetric with
b(r1, r2) = 3, b(x2, x3) = 1, 6(x2, T4) = 2.
%3D
Let c = 0 and let m(x) = deg(x). Let f, g E C(X) be functions defined by
f(x1) = 1, f(r2) = 2, f(x3) = 3, f(¤4) = 4,
g(x1) = 0, g(r2) = -3, g(x3) = 4, g(x4) = -1.
and
(a) Calculate the inner product (f, g), and norms || f|| and ||g|| in l2(X,m).
(b) Find ||f - g||.
(c) Show that ||h|| =0 for a function h e C(X) if and only if h = 0.
(d) Calculate Qb.c(f,9), Qb,c(f) and Qb,c(9).
(e) Find Lic.mf (x) and Lb.c.mg(x) for r e X.
(f) Show that Qb.c(f,9) = (Lt.c,mf, g) = (f, Lb.c.m9).
(g) Identify the maximum and minimum of both f and g. Verify that Lb.c.mf (x) >0 at the
maximum and L.c.mf (x) < 0 at the minimum with an analogous statement for g.
Transcribed Image Text:1. Let X = {r1, x2, T3, 24} and let b: X x X → [0, 0) be symmetric with b(r1, r2) = 3, b(x2, x3) = 1, 6(x2, T4) = 2. %3D Let c = 0 and let m(x) = deg(x). Let f, g E C(X) be functions defined by f(x1) = 1, f(r2) = 2, f(x3) = 3, f(¤4) = 4, g(x1) = 0, g(r2) = -3, g(x3) = 4, g(x4) = -1. and (a) Calculate the inner product (f, g), and norms || f|| and ||g|| in l2(X,m). (b) Find ||f - g||. (c) Show that ||h|| =0 for a function h e C(X) if and only if h = 0. (d) Calculate Qb.c(f,9), Qb,c(f) and Qb,c(9). (e) Find Lic.mf (x) and Lb.c.mg(x) for r e X. (f) Show that Qb.c(f,9) = (Lt.c,mf, g) = (f, Lb.c.m9). (g) Identify the maximum and minimum of both f and g. Verify that Lb.c.mf (x) >0 at the maximum and L.c.mf (x) < 0 at the minimum with an analogous statement for g.
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