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Let A be a finite set. If f: A->A is an ...

Let `A` be a finite set. If `f: A->A` is an onto function, show that `f` is one-one also.

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RD SHARMA ENGLISH-FUNCTION-All Questions
  1. Let f: Nuu{0}->Nuu{0} be defined by f(n)={n+1,\ if\ n\ i s\ e v e nn-1...

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  2. Let A be a finite set. If f: A->A is a one-one function, show that ...

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  3. Let A be a finite set. If f: A->A is an onto function, show that f ...

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  4. Give an example of a function which is one-one but not onto. whi...

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  5. Which of the following functions from A to B are one-one and onto? ...

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  6. Prove that the function f: N->N , defined by f(x)=x^2+x+1 is one-on...

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  7. Let A={-1,\ 0,\ 1} and f={(x ,\ x^2): x in A} . Show that f: A->A is ...

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  8. Classify f: N->N given by f(x)=x^2 as injection, surjection or bije...

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  9. Classify f: Z->Z given by f(x)=x^2 as injection, surjection or bije...

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  10. Classify f: N->N given by f(x)=x^3 as injection, surjection or bije...

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  11. Classify f: Z->Z given by f(x)=x^3 as injection, surjection or bije...

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  12. Classify f: R->R , defined by f(x)=|x| as injection, surjection or ...

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  13. Classify f: Z->Z , defined by f(x)=x^2+x as injection, surjection o...

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  14. Classify f: Z->Z , defined by f(x)=x-5 as injection, surjection or ...

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  15. Classify f: R->R , defined by f(x)=sinx as injection, surjection or...

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  16. Classify f: R->R , defined by f(x)=x^3+1 as injection, surjection o...

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  17. Classify f: R->R , defined by f(x)=x^3-x as injection, surjection o...

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  18. Classify f: R->R , defined by f(x)=sin^2x+cos^2x as injection, surje...

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  19. Classify f: Q-{3}->Q , defined by f(x)=(2x+3)/(x-3) as injection, s...

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  20. Find dy/dx if y^7=x

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