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Which of the following is a function ?...

Which of the following is a function ?

A

`{(x, y) : y^(2) = x, x, y in R}`

B

`{(x, y) : y = |x|, x, y, in R}`

C

`{(x, y) : x^(2) + y^(2) = 1, y, x in R}`

D

`{(x, y) : x^(2) - y^(2) = 1, x, y in R}`

Text Solution

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The correct Answer is:
B
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AAKASH INSTITUTE ENGLISH-RELATIONS AND FUNCTIONS -Assignment (Section - B) Objective Type Questions (one option is correct)
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  3. Which of the following is a function ?

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  5. If f(x) is a polynomial function of the second degree such that, f(-3)...

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  6. Let y=sgn (x), then

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  7. The range of the function defined as f(x) = log(3)((1)/(sqrt([cosx] - ...

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  8. Let R be a relation defined on set A={1, 2, 3,4,5,6,7,8} such that R=...

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  9. Consider two sets A = {a, b}, B = {e, f}. If maximum numbers of relati...

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  10. Consider three sets A = {1, 2, 3}, B = {3, 4, 5, 6}, C = {6, 7, 8, 9}....

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  11. Consider the set A= {3, 4, 5} and the number of null relations, identi...

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  12. Let L be the set of all straight lines in plane. l(1) and l(2) are two...

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  13. Let R be a relation on A = {a, b, c} such that R = {(a, a), (b, b), (c...

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  14. Let R be a relation on the set of all real numbers defined by xRy iff ...

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  15. Given the relation R={(1,\ 2),\ (2,\ 3)} on the set A={1,\ 2,\ 3} , ad...

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  16. Let S be the set of all real numbers. Then the relation R= {(a,b):1+...

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