Calculus for Business, Economics, Life Sciences, and Social Sciences - Boston U.
15th Edition
ISBN: 9781323047620
Author: Barnett, Ziegler, Byleen
Publisher: Pearson Education
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Textbook Question
Chapter DPT, Problem 47E
In Problems 45–50, solve for x.
47.
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Students have asked these similar questions
Keity
x२
1. (i)
Identify which of the following subsets of R2 are open and which
are not.
(a)
A = (2,4) x (1, 2),
(b)
B = (2,4) x {1,2},
(c)
C = (2,4) x R.
Provide a sketch and a brief explanation to each of your answers.
[6 Marks]
(ii)
Give an example of a bounded set in R2 which is not open.
[2 Marks]
(iii)
Give an example of an open set in R2 which is not bounded.
[2 Marks
2.
(i)
Which of the following statements are true? Construct coun-
terexamples for those that are false.
(a)
sequence.
Every bounded sequence (x(n)) nEN C RN has a convergent sub-
(b)
(c)
(d)
Every sequence (x(n)) nEN C RN has a convergent subsequence.
Every convergent sequence (x(n)) nEN C RN is bounded.
Every bounded sequence (x(n)) EN CRN converges.
nЄN
(e)
If a sequence (xn)nEN C RN has a convergent subsequence, then
(xn)nEN is convergent.
[10 Marks]
(ii)
Give an example of a sequence (x(n))nEN CR2 which is located on
the parabola x2 = x², contains infinitely many different points and converges
to the limit x = (2,4).
[5 Marks]
2.
(i) What does it mean to say that a sequence (x(n)) nEN CR2
converges to the limit x E R²?
[1 Mark]
(ii) Prove that if a set ECR2 is closed then every convergent
sequence (x(n))nen in E has its limit in E, that is
(x(n)) CE and x() x
x = E.
[5 Marks]
(iii)
which is located on the parabola x2 = = x
x4, contains a subsequence that
Give an example of an unbounded sequence (r(n)) nEN CR2
(2, 16) and such that x(i)
converges to the limit x = (2, 16) and such that x(i)
#
x() for any i j.
[4 Marks
Chapter DPT Solutions
Calculus for Business, Economics, Life Sciences, and Social Sciences - Boston U.
Ch. DPT - Work all of the problems in this self-test without...Ch. DPT - Work all of the problems in this self-test without...Ch. DPT - Work all of the problems in this self-test without...Ch. DPT - Work all of the problems in this self-test without...Ch. DPT - Work all of the problems in this self-test without...Ch. DPT - Work all of the problems in this self-test without...Ch. DPT - Work all of the problems in this self-test without...Ch. DPT - Work all of the problems in this self-test without...Ch. DPT - Work all of the problems in this self-test without...Ch. DPT - Work all of the problems in this self-test without...
Ch. DPT - Work all of the problems in this self-test without...Ch. DPT - Work all of the problems in this self-test without...Ch. DPT - Work all of the problems in this self-test without...Ch. DPT - Work all of the problems in this self-test without...Ch. DPT - Work all of the problems in this self-test without...Ch. DPT - Give an example of an integer that is not a...Ch. DPT - Prob. 17ECh. DPT - Prob. 18ECh. DPT - Prob. 19ECh. DPT - Prob. 20ECh. DPT - Prob. 21ECh. DPT - In Problems 1724, simplify and write answers using...Ch. DPT - Prob. 23ECh. DPT - Prob. 24ECh. DPT - In Problems 2530, perform the indicated operation...Ch. DPT - In Problems 2530, perform the indicated operation...Ch. DPT - In Problems 2530, perform the indicated operation...Ch. DPT - Prob. 28ECh. DPT - In Problems 2530, perform the indicated operation...Ch. DPT - In Problems 2530, perform the indicated operation...Ch. DPT - Each statement illustrates the use of one of the...Ch. DPT - Round to the nearest integer: (A)173 (B)519Ch. DPT - Multiplying a number x by 4 gives the same result...Ch. DPT - Find the slope of the line that contains the...Ch. DPT - Find the x and y coordinates of the point at which...Ch. DPT - Find the x and y coordinates of the point at which...Ch. DPT - In Problems 37 and 38, factor completely....Ch. DPT - In Problems 37 and 38, factor completely....Ch. DPT - In Problems 3942, write in the form axp + byq...Ch. DPT - Prob. 40ECh. DPT - Prob. 41ECh. DPT - In Problems 3942, write in the form axp + byq...Ch. DPT - Prob. 43ECh. DPT - Prob. 44ECh. DPT - In Problems 4550, solve for x. 45.x2=5xCh. DPT - In Problems 4550, solve for x. 46.3x221=0Ch. DPT - In Problems 4550, solve for x. 47.x2x20=0Ch. DPT - In Problems 4550, solve for x. 48.6x2+7x1=0Ch. DPT - In Problems 4550, solve for x. 49.x2+2x1=0Ch. DPT - In Problems 4550, solve for x. 50.x46x2+5=0
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- 1. (i) which are not. Identify which of the following subsets of R2 are open and (a) A = (1, 3) x (1,2) (b) B = (1,3) x {1,2} (c) C = AUB (ii) Provide a sketch and a brief explanation to each of your answers. [6 Marks] Give an example of a bounded set in R2 which is not open. (iii) [2 Marks] Give an example of an open set in R2 which is not bounded. [2 Marks]arrow_forwardsat Pie Joday) B rove: ABCB. Step 1 Statement D is the midpoint of AC ED FD ZEDAZFDC Reason Given 2 ADDC Select a Reason... A OBB hp B E F D Carrow_forward2. if limit. Recall that a sequence (x(n)) CR2 converges to the limit x = R² lim ||x(n)x|| = 0. 818 - (i) Prove that a convergent sequence (x(n)) has at most one [4 Marks] (ii) Give an example of a bounded sequence (x(n)) CR2 that has no limit and has accumulation points (1, 0) and (0, 1) [3 Marks] (iii) Give an example of a sequence (x(n))neN CR2 which is located on the hyperbola x2 1/x1, contains infinitely many different Total marks 10 points and converges to the limit x = (2, 1/2). [3 Marks]arrow_forward
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