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Let A={1,2,3,4,5}, B={1,2,3,4} and f:A r...

Let A={1,2,3,4,5}, B={1,2,3,4} and `f:A rarr B` is a function, then

A

A. number of onto functions, if n(f(A))=4 is 240

B

B. number of onto functions, if n(f(A))=3 is 600

C

C. number of onto functions, if n(f(A))=2 is 180

D

D. number of onto functions, if n(f(A))=1 is 4

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ARIHANT MATHS-FUNCTIONS-Exercise (More Than One Correct Option Type Questions)
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  6. Let A={1,2,3,4,5}, B={1,2,3,4} and f:A rarr B is a function, then

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  7. In a function 2f(x)+ xf(1/x)-2f(|sqrt2sin(pi(x+1/4))|)=4cos^2[(pix)/2]...

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  13. Let f(x)=1-x-x^3.Find all real values of x satisfying the inequality,...

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  14. If a function satisfies (x-y)f(x+y)-(x+y)f(x-y)=2(x^2 y-y^3) AA x, y i...

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  15. If the fundamental period of function f(x)=sinx+cos(sqrt(4-a^(2)))x "...

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  16. Let f (x) be a real vaued continuous function such that f (0) =1/2 a...

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  17. if f(g(x)) is one-one function, then

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  20. Let f:R rarr R defined by f(x)=cos^(-1)(-{-x}), where {x} denotes fra...

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