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True or False statements : Let N be th...

True or False statements :
Let N be the set of natural numbers. Then, the binary operation * on N defined as a * b = a + b for all a , b `in` N has the identity element.

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PRADEEP PUBLICATION-RELATIONS AND FUNCTIONS-EXERCISE
  1. True or False statements : A binary operatio on a set has always the...

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  2. The function f : R rarr R defined by f(x) = 1 + x^2 is :

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  3. True or False statements : Let N be the set of natural numbers. Then...

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  4. True or False statements : The function f : R rarr R defined by f(x)...

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  5. Let A = {0, 1} and N be the set of natural numbers. Then the mapping f...

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  6. True or False statements : The binary operation * defined in Z by a ...

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  7. An integer m is said to be related to another integer n if m is a inte...

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  8. Let R be a relation from a set A to a set B, then:

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  9. True or False statements : Composition of functions is associative.

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  10. True or False statements : The function f : R rarr R defined by f(x)...

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  11. Let f : A rarr B and g : B rarr C be onto functions, show that gof is ...

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  12. Let f : A rarr B and g : B rarr C be onto functions, show that gof is ...

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  13. For all sets A, B and C, if A⊂ C and B ⊂ C,then A∪ B ⊂ C.

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  14. Match the following : .

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  15. Consider the set A = (a,b). The smallest equivalence relation that can...

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  16. Consider the set A = (1,2). Which of the following relations on A is s...

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  17. Let A be a finite set containing n distinct elements. The number of re...

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  18. Let T be the set of all triangles in the Euclidean plane, and let a re...

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  19. Consider the non-empty set consisting of children in a family and a re...

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  20. If a relation R on the set {1, 2, 3} be defined by R = {(1, 2)}, then ...

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