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The number of onto function from set {1,...

The number of onto function from set `{1,2,3,4} " to " {3,4,7}` is .......

A

18

B

36

C

64

D

None of these

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The correct Answer is:
B
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KUMAR PRAKASHAN-RELATIONS AND FUNCTIONS -Textbook based MCQs
  1. a gt 1 is a real number f(x) = log(a)x^2 , where x gt 0 If f^(-1)(x)...

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  2. f : R rarr R , f(x) = 2 x + |cosx| then f is ......... function .

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  3. The number of onto function from set {1,2,3,4} " to " {3,4,7} is ........

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  4. Match the Section (A) with the Section (B) properly.

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  5. f:[0,3] rarr [1,29],f(x) =2x^(3)-15x^2+36x+1 then f is ........ functi...

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  6. f(x,y) = (max (x,y))^((min(x,y))) and g(x,y)= max (x,y) - min (x,y) th...

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  7. Let A = {1,2,3}. Then number of equivalence relations containing (1,2)...

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  8. S is defined in Z by (x,y ) in S hArr |x-y| le 1. S is ........

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  9. If S is defined on R by (x,y) inR hArr xy ge 0 . Then S is ...........

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  10. Which of the following defined on Z is not an equivalence relation ?

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  11. If a**b=(ab)/3 on Q^+ then the inverse of a(a ne0) for ** is ......

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  12. The number of binary operation on {1,2,3,......,n} is ..........

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  13. If a**b = a +b on R - {1} , then a^(-1) is ........

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  14. For a**b = a +b + 10 on Z , the identity element is ........

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  15. f:R-{q} rarrR -{1},f(x) = (x-p)/(x-q), p ne q , then f is .........

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  16. Check the injectivity and surjectivity of the following function . f...

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  17. f:[-(pi)/2,pi/2]rarr[-1,1] is a bijection , if ......

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  18. f : R rarr R , f(x) = x^(2) +2x +3 is .......

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  19. If a**b =a^(2) +b^(2) on Z , then ** is ..........

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  20. If a**b = a +b - ab on Q^(+) , then the identity and the inverse of a...

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