हिंदी

Construct the Composition Table for +5 on Set S = {0, 1, 2, 3, 4}. - Mathematics

Advertisements
Advertisements

प्रश्न

Construct the composition table for +5 on set S = {0, 1, 2, 3, 4}.

उत्तर

1 \[+_5\] 1 = Remainder obtained by dividing 1 + 1 by 5

= 2

3 \[+_5\] 4 = Remainder obtained by dividing 3 + 4 by 5
           = 2

4 \[+_5\] 4 = Remainder obtained by dividing 4 + 4 by 5
             = 3

So, the composition table is as follows :

+5 0 1 2 3 4
0 0 1 2 3 4
1 1 2 3 4 5
2 2 3 4 0 1
3 3 4 0 1 2
4 4 0 1 2 3

 

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 3: Binary Operations - Exercise 3.5 [पृष्ठ ३३]

APPEARS IN

आरडी शर्मा Mathematics [English] Class 12
अध्याय 3 Binary Operations
Exercise 3.5 | Q 2 | पृष्ठ ३३

संबंधित प्रश्न

LetA= R × R and * be a binary operation on A defined by (a, b) * (c, d) = (a+c, b+d)

Show that * is commutative and associative. Find the identity element for * on A. Also find the inverse of every element (a, b) ε A.


Determine whether or not of the definition of given below gives a binary operation. In the event that * is not a binary operation, give justification for this.

On Z+, define * by ab


For each binary operation * defined below, determine whether * is commutative or associative.

On Z+, define = 2ab


For each binary operation * defined below, determine whether * is commutative or associative.

On Z+, define ab


Consider a binary operation * on the set {1, 2, 3, 4, 5} given by the following multiplication table.

(i) Compute (2 * 3) * 4 and 2 * (3 * 4)

(ii) Is * commutative?

(iii) Compute (2 * 3) * (4 * 5).

(Hint: use the following table)

* 1 2 3 4 5
1 1 1 1 1 1
2 1 2 1 2 1
3 1 1 3 1 1
4 1 2 1 4 1
5 1 1 1 1 5

Let * be the binary operation on given by a * = L.C.M. of and b. Find

(i) 5 * 7, 20 * 16

(ii) Is * commutative?

(iii) Is * associative?

(iv) Find the identity of * in N

(v) Which elements of are invertible for the operation *?


Consider the binary operations*: ×→ and o: R × R → defined as a * b = |a - b| and ab = a, &mnForE;ab ∈ R. Show that * is commutative but not associative, o is associative but not commutative. Further, show that &mnForE;abc ∈ Ra*(b o c) = (ab) o (a * c). [If it is so, we say that the operation * distributes over the operation o]. Does o distribute over *? Justify your answer.


Number of binary operations on the set {ab} are

(A) 10

(B) 16

(C) 20

(D) 8


Determine whether the following operation define a binary operation on the given set or not : '×6' on S = {1, 2, 3, 4, 5} defined by

a ×6 b = Remainder when ab is divided by 6.


Determine whether the following operation define a binary operation on the given set or not :

\[' +_6 ' \text{on S} = \left\{ 0, 1, 2, 3, 4, 5 \right\} \text{defined by}\] 
\[a +_6 b = \begin{cases}a + b & ,\text{ if a} + b < 6 \\ a + b - 6 & , \text{if a} + b \geq 6\end{cases}\]


Determine whether or not the definition of * given below gives a binary operation. In the event that * is not a binary operation give justification of this.

On R, define * by a * b = a + 4b2

Here, Z+ denotes the set of all non-negative integers.


Find the total number of binary operations on {ab}.


Prove that the operation * on the set

\[M = \left\{ \begin{bmatrix}a & 0 \\ 0 & b\end{bmatrix}; a, b \in R - \left\{ 0 \right\} \right\}\] defined by A * B = AB is a binary operation.


Determine which of the following binary operations are associative and which are commutative : * on Q defined by \[a * b = \frac{a + b}{2} \text{ for all a, b } \in Q\] ?


Check the commutativity and associativity of the following binary operations '*'. on N defined by a * b = 2ab for all a, b ∈ N ?


Check the commutativity and associativity of the following binary operations '*'. on Q defined by a * b = a − b for all a, b ∈ Q ?


Check the commutativity and associativity of the following binary operation '*' on Q defined by a * b = a + ab for all ab ∈ Q ?


Check the commutativity and associativity of the following binary operation  '*' on R defined by a * b = a + b − 7 for all ab ∈ R ?


Check the commutativity and associativity of the following binary operation '*' on N, defined by a * b = ab for all ab ∈ N ?


On Z, the set of all integers, a binary operation * is defined by a * b = a + 3b − 4. Prove that * is neither commutative nor associative on Z.


On the set Z of integers, if the binary operation * is defined by a * b = a + b + 2, then find the identity element.


Let 'o' be a binary operation on the set Q0 of all non-zero rational numbers defined by \[a o b = \frac{ab}{2}, \text{ for all a, b } \in Q_0\] :

 Find the identity element in Q0.


On R − {1}, a binary operation * is defined by a * b = a + b − ab. Prove that * is commutative and associative. Find the identity element for * on R − {1}. Also, prove that every element of R − {1} is invertible.


Let A  \[=\] R  \[\times\] R and \[*\]  be a binary operation on defined by \[(a, b) * (c, d) = (a + c, b + d) .\] . Show that \[*\] is commutative and associative. Find the binary element for \[*\] on A, if any.


Write the identity element for the binary operation * defined on the set R of all real numbers by the rule

\[a * b = \frac{3ab}{7} \text{ for all a, b} \in R .\] ?


Write the inverse of 5 under multiplication modulo 11 on the set {1, 2, ... ,10}.


Let +6 (addition modulo 6) be a binary operation on S = {0, 1, 2, 3, 4, 5}. Write the value of \[2 +_6 4^{- 1} +_6 3^{- 1} .\]


If the binary operation * on Z is defined by a * b = a2 − b2 + ab + 4, then value of (2 * 3) * 4 is ____________ .


Q+ is the set of all positive rational numbers with the binary operation * defined by \[a * b = \frac{ab}{2}\] for all ab ∈ Q+. The inverse of an element a ∈ Q+ is ______________ .


An operation * is defined on the set Z of non-zero integers by \[a * b = \frac{a}{b}\]  for all ab ∈ Z. Then the property satisfied is _______________ .


For the multiplication of matrices as a binary operation on the set of all matrices of the form \[\begin{bmatrix}a & b \\ - b & a\end{bmatrix}\] a, b ∈ R the inverse of \[\begin{bmatrix}2 & 3 \\ - 3 & 2\end{bmatrix}\] is ___________________ .


If * is defined on the set R of all real numbers by *: a*b = `sqrt(a^2 + b^2 ) `, find the identity elements, if it exists in R with respect to * .


In the set N of natural numbers, define the binary operation * by m * n = g.c.d (m, n), m, n ∈ N. Is the operation * commutative and associative?


Let * be the binary operation defined on Q. Find which of the following binary operations are commutative

a * b = (a – b)2 ∀ a, b ∈ Q


Let * be a binary operation on Q, defined by a * b `= (3"ab")/5` is  ____________.


The identity element for the binary operation * defined on Q – {0} as a * b = `"ab"/2 AA  "a, b" in "Q" - {0}` is ____________.


Subtraction and division are not binary operation on.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×