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If A={1,\ 2,\ 3} , show that an onto ...

If `A={1,\ 2,\ 3}` , show that an onto function `f: A->A` must be one-one

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RD SHARMA ENGLISH-FUNCTION-All Questions
  1. Show that the logarithmic function f: R0+->R given by f(x)=(log)a x...

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  2. Show that a one-one function f : {1, 2, 3}-> {1, 2, 3}must be onto.

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  3. If A={1,\ 2,\ 3} , show that an onto function f: A->A must be one-o...

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  4. Find the number of all onto functions from the set A={1,\ 2,\ 3,\ ...

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  5. Give examples of two one-one functions f1 and f2 from R to R such t...

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  6. Give examples of two surjective function f1 and f2 from Z to Z such...

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  7. Show that if f1 and f2 are one-one maps from R to R , then the product...

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  8. Suppose f1 and f2 are non-zero one-one functions from R to R . Is (...

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  9. Given A={2,\ 3,\ 4} , B={2,\ 5,\ 6,\ 7} . Construct an example of a...

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  10. Given A={2,\ 3,\ 4} , B={2,\ 5,\ 6,\ 7} . Construct an example of a...

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  11. Given A={2,\ 3,\ 4} , B={2,\ 5,\ 6,\ 7} . Construct an example of a...

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  12. Show that f: R->R , given by f(x)=x-[x] , is neither one-one nor onto.

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  13. Let f: N->N be defined by: f(n)={(n+1)/2, if n is odd (n-1)/2, if n i...

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  14. Let R be the set of real numbers. If f: R->R :f(x)=x^2 and g: R->R ...

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  15. Let : R->R ; f(x)=sinx and g: R->R ; g(x)=x^2 find fog and gof .

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  16. Let f:{2,3,4,5}vec{3,4,5,9}a n dg:{3,4,5,9}vec{7, 11 , 15} be function...

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  17. Let f:{1,\ 3,4\ }->{1,\ 2,\ 5} and g:{1,\ 2,\ 5}->{1,\ 3} be given by ...

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  18. Find gof and fog , if f: R->R and g: R->R are given by f(x)=|x| and g(...

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  19. If the functions f and g are given by f={(1,\ 2),\ (3,\ 5),\ (4,\ 1)} ...

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  20. If the function f: R->R be given by f(x)=x^2+2 and g: R->R be given by...

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