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Which of the following relations is a fu...

Which of the following relations is a function?

A

{(1, 4), (2, 6), (1, 5), (3, 9)}

B

{(3,3), (2, 1), (1,2), (2, 3)}

C

{(1, 2), (2,2),(3,2), (4,2)}

D

{(3, 1), (3,2), (3,3), (3, 4)}

Text Solution

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The correct Answer is:
C
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AAKASH INSTITUTE ENGLISH-RELATIONS AND FUNCTIONS -Assignment (Section - A) Objective Type Questions (one option is correct)
  1. Let A = {1, 2, 3} and R = {(1, 1), (2,2), (1, 2), (2, 1), (1,3)} then ...

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  2. Let A = {1, 2, 3}. Which of the following is not an equivalence relat...

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  3. Which of the following relations is a function?

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  4. Let A = {1, 2, 3}, B = { 2, 3, 4} , then which of the following is a f...

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  5. The function f: NvecN(N is the set of natural numbers) defined by f(n)...

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  6. Let f : R rarr R be defined by f(x) = x^(2) - 3x + 4 for all x in R, t...

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  7. If f is a function form a set A to A, then f is invertible iff f is

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  8. Let f : R rarr R, g : R rarr R be two functions given by f(x) = 2x - 3...

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  9. Set A has 3 elements and set B has 4 elements. The number of injection...

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  10. Find the number of surjections from A to B, where A={1,2,3,4}, B={a,b}...

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  11. Let A and B be two finite sets having m and n elements respectively. T...

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  12. The total number of injective mappings from a set with m elements to a...

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  13. Let A be a set containing 10 distinct elements. Then the total number ...

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  14. Let E={1,2,3,4,} and F={1,2}. Then the number of onto functions from E...

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  15. If f : R rarr R, f(x) = 1/(x^2 - 1), then domain is

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  16. Function f :R->R,f(x) = x|x| is

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  17. domain of f(x) = (x^(2))/(1-x^(2)), is

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  18. Let f : N rarr N be defined as f(x) = 2x for all x in N, then f is

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  19. Let A={1,2,3,4,5,6}dot Define a relation R on set A by R={(x , y): y=x...

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  20. Let f(x) = [x] and g(x) = x - [x], then which of the following functi...

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