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Recent questions in Engineering Mathematics
0
votes
1
answer
2701
Kenneth Rosen Edition 7 Exercise 1.7 Question 15 (Page No. 91)
Use a proof by contraposition to show that if $x+y≥2$,where $x$ and $y$ are real numbers, then $x≥1$ or $y≥1$.
Use a proof by contraposition to show that if $x+y≥2$,where $x$ and $y$ are real numbers, then $x≥1$ or $y≥1$.
Pooja Khatri
465
views
Pooja Khatri
asked
Apr 4, 2019
Mathematical Logic
kenneth-rosen
discrete-mathematics
mathematical-logic
propositional-logic
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–
0
votes
0
answers
2702
Kenneth Rosen Edition 7 Exercise 1.7 Question 14 (Page No. 91)
Prove that if $x$ is rational and $x\neq0$ , then $1/x$ is rational.
Prove that if $x$ is rational and $x\neq0$ , then $1/x$ is rational.
Pooja Khatri
173
views
Pooja Khatri
asked
Apr 4, 2019
Mathematical Logic
kenneth-rosen
discrete-mathematics
mathematical-logic
propositional-logic
+
–
0
votes
0
answers
2703
Kenneth Rosen Edition 7 Exercise 1.7 Question 13 (Page No. 91)
Prove that if $x$ is irrational, then $1/x$ is irrational.
Prove that if $x$ is irrational, then $1/x$ is irrational.
Pooja Khatri
202
views
Pooja Khatri
asked
Apr 4, 2019
Mathematical Logic
kenneth-rosen
discrete-mathematics
mathematical-logic
propositional-logic
+
–
0
votes
0
answers
2704
Kenneth Rosen Edition 7 Exercise 1.7 Question 12 (Page No. 91)
Prove or disprove that the product of a nonzero rational number and an irrational number is irrational.
Prove or disprove that the product of a nonzero rational number and an irrational number is irrational.
Pooja Khatri
324
views
Pooja Khatri
asked
Apr 4, 2019
Mathematical Logic
kenneth-rosen
discrete-mathematics
mathematical-logic
propositional-logic
+
–
1
votes
1
answer
2705
Kenneth Rosen Edition 7 Exercise 1.7 Question 11 (Page No. 91)
Prove or disprove that the product of two irrational numbers is irrational.
Prove or disprove that the product of two irrational numbers is irrational.
Pooja Khatri
296
views
Pooja Khatri
asked
Apr 4, 2019
Mathematical Logic
kenneth-rosen
discrete-mathematics
mathematical-logic
propositional-logic
+
–
1
votes
1
answer
2706
Kenneth Rosen Edition 7 Exercise 1.7 Question 10 (Page No. 91)
Use a direct proof to show that the product of two rational numbers is rational.
Use a direct proof to show that the product of two rational numbers is rational.
Pooja Khatri
2.6k
views
Pooja Khatri
asked
Apr 4, 2019
Mathematical Logic
kenneth-rosen
discrete-mathematics
mathematical-logic
propositional-logic
+
–
0
votes
0
answers
2707
Kenneth Rosen Edition 7 Exercise 1.7 Question 9 (Page No. 91)
Use a proof by contradiction to prove that the sum of an irrational number and a rational number is irrational.
Use a proof by contradiction to prove that the sum of an irrational number and a rational number is irrational.
Pooja Khatri
183
views
Pooja Khatri
asked
Apr 4, 2019
Mathematical Logic
kenneth-rosen
discrete-mathematics
mathematical-logic
propositional-logic
+
–
0
votes
0
answers
2708
Kenneth Rosen Edition 7 Exercise 1.7 Question 8 (Page No. 91)
Prove that if $n$ is a perfect square, then $n+2$ is not a perfect square
Prove that if $n$ is a perfect square, then $n+2$ is not a perfect square
Pooja Khatri
150
views
Pooja Khatri
asked
Apr 4, 2019
Mathematical Logic
kenneth-rosen
discrete-mathematics
mathematical-logic
propositional-logic
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–
0
votes
1
answer
2709
Self doubt
How is the problem.. Distribute 5 toys such that each of 3 child get atleast 1 Different from sum of 3 no. X+y+z=5 such that each digit >= 1. Plz explain ?
How is the problem..Distribute 5 toys such that each of 3 child get atleast 1Different from sum of 3 no. X+y+z=5 such that each digit >= 1.Plz explain ?
Manoj Kumar Pandey
647
views
Manoj Kumar Pandey
asked
Apr 4, 2019
Combinatory
combinatory
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–
0
votes
0
answers
2710
Made easy work book
Manoj Kumar Pandey
190
views
Manoj Kumar Pandey
asked
Apr 3, 2019
0
votes
1
answer
2711
Combinatorics
There are 6n flowers of one type and 3 flowers of second type, total no. Of garlands possible?
There are 6n flowers of one type and 3 flowers of second type, total no. Of garlands possible?
Manoj Kumar Pandey
475
views
Manoj Kumar Pandey
asked
Apr 2, 2019
Combinatory
combinatory
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–
0
votes
1
answer
2712
Discrete Mathematics by Kenneth Rossen 7th Ed. Chapter 1 Page 89 Example 8
kaveeshnyk
656
views
kaveeshnyk
asked
Apr 1, 2019
Mathematical Logic
kenneth-rosen
discrete-mathematics
mathematical-logic
propositional-logic
+
–
0
votes
0
answers
2713
General Query: Self doubt(Math+Automata)
Can somebody explain What is identity permutation?
Can somebody explainWhat is identity permutation?
srestha
324
views
srestha
asked
Apr 1, 2019
Combinatory
discrete-mathematics
finite-automata
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–
0
votes
1
answer
2714
self-doubt
A graph with alternating edges and vertices is called a walk (we can repeat the number of vertices and edges any number of times) . A walk in which no edges are repeated is called a trial. A trial in which no vertices are repeated is called a path. A trial in which only the starting and ending vertices are repeated is called a circuit. Are the definitions correct??
A graph with alternating edges and vertices is called a walk (we can repeat the number of vertices and edges any number of times) .A walk in which no edges are repeated ...
Doraemon
673
views
Doraemon
asked
Mar 31, 2019
Graph Theory
graph-theory
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–
0
votes
1
answer
2715
website
There is 4 coins 1 paisa, 5 paise, 10 paise, 25 paise using these coins we have to make 50 paisa how many combination can we make ?
There is 4 coins 1 paisa, 5 paise, 10 paise, 25 paise using these coins we have to make 50 paisa how many combination can we make ?
Cristine
317
views
Cristine
asked
Mar 31, 2019
Combinatory
combinatory
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–
0
votes
2
answers
2716
self doubt
What is the general formula for number of simple graph having n unlabelled vertices ??
What is the general formula for number of simple graph having n unlabelled vertices ??
Doraemon
1.3k
views
Doraemon
asked
Mar 31, 2019
Graph Theory
simple-graph
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–
0
votes
0
answers
2717
#KennethRosen#DiscreteMaths
R is iff $R ^{-1}$ is Total ? a function ? a surjection ? an injection ? a bijection ? Fill in the entries in the table.
R isiff $R ^{-1}$ isTotal?a function?a surjection?an injection?a bijection?Fill in the entries in the table.
Sumiran Agrawal
254
views
Sumiran Agrawal
asked
Mar 30, 2019
Set Theory & Algebra
relations
kenneth-rosen
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–
0
votes
1
answer
2718
Allen Career Institute: Spanning tree
Let $G$ be a simple undirected complete and weighted graph with vertex set $V = {0, 1, 2, . 99.}$ Weight of the edge $(u, v)$ is $\left | u-v \right |$ where $0\leq u, v\leq 99$ and $u\neq v$. Weight ... tree is______________ Doubt:Here asking for maximum weight spanning tree. So, there weight will be $0$ to every node. Isnot it? but answer given 7351.
Let $G$ be a simple undirected complete and weighted graph with vertex set $V = {0, 1, 2, …. 99.}$ Weight of the edge $(u, v)$ is $\left | u-v \right |$ where $0\leq u,...
srestha
561
views
srestha
asked
Mar 29, 2019
Graph Theory
discrete-mathematics
+
–
1
votes
1
answer
2719
Allen Career Institute:Graph Theory
If G be connected planar graph with 12 vertices of deg 4 each. In how many regions can this planar graph be partitioned?
If G be connected planar graph with 12 vertices of deg 4 each. In how many regions can this planar graph be partitioned?
srestha
346
views
srestha
asked
Mar 28, 2019
Graph Theory
discrete-mathematics
+
–
1
votes
3
answers
2720
Proposition Logic-Rosen(7e)
Show that these statements are inconsistent: “If Miranda does not take a course in discrete mathematics, then she will not graduate.” “If Miranda does not graduate, then she is not qualified for the job.” “If Miranda reads this book, then she is qualified for the job.” “Miranda does not take a course in discrete mathematics but she reads this book.” how to approach?
Show that these statements are inconsistent: “If Miranda does not take a course in discrete mathematics, then she will not graduate.” “If Miranda does not graduate,...
aditi19
2.6k
views
aditi19
asked
Mar 26, 2019
Mathematical Logic
mathematical-logic
discrete-mathematics
kenneth-rosen
propositional-logic
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