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Let * be a binary operation on set Q of rational numbers defined as a*b = \( \large\frac{3ab}{7} \). Write the identity for * , if any.
cbse
class12
modelpaper
2012
sec-a
q1
math
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asked
Dec 24, 2012
by
thanvigandhi_1
edited
Jul 25, 2013
by
sreemathi.v
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0
votes
1
answer
Let * ba a binary operation on set Q of rational defined as \( a*b=\large\frac{ab}{5}.\) Write the identity for * , if any.
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Feb 9, 2013
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cbse
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Let * be binary operation on Q defined by $ a*b=\large\frac{3ab}{5} $ show that * is commutative as well as associative. Also find its identity element if it exists.
asked
Feb 4, 2013
by
thanvigandhi_1
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modelpaper
2012
sec-b
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0
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0
answers
Let * be binary operation of N x N defined by (a,b)*(c,d)=(a+c,b+d). Show that * is commutative as well as associative. Find the identity element for the operation * on N x N, if any.
asked
Feb 2, 2013
by
thanvigandhi_1
cbse
class12
modelpaper
2012
sec-b
q11
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0
votes
0
answers
Let * be binary operation of N x N defined by (a,b)*(c,d)=(a+c, b+d). Show that * is commutative as well as associative. Find the identity element for the operation * on N x N, if any.
asked
Jan 31, 2013
by
thanvigandhi_1
cbse
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modelpaper
2012
sec-b
q11
math
0
votes
0
answers
Let A = N x N and * be a binary operation on A defined by (a,b)*(c,d)=(ac,bd), show that : (i) (A*) is commutative. (ii) (A*) is associative (iii) Find the identity element, if any, in A.
asked
Jan 31, 2013
by
thanvigandhi_1
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2012
sec-c
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0
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1
answer
A binary operation * on the set (0,1,2,3,4,5} is defined as : $ f(x) = \left\{ \begin{array}{l l}a+b, & \quad if { a+b < 6} \\ a+b-6, & \quad if { a+b \geq 6} \end{array} \right. $ Show that zero is the identity for this operation and each element 'a' of the set is invertible with 6-a, being the inverse of 'a'.
asked
Feb 5, 2013
by
thanvigandhi_1
cbse
class12
modelpaper
2012
sec-b
q11
medium
math
0
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1
answer
Let * be a binary operation on N given by \( a*b=H.C.F.(a,b), a,b \in N.\) Write value of 22*4.
asked
Feb 7, 2013
by
thanvigandhi_1
cbse
class12
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