Q. 3

Mark the correct alternative in the following:

Which one of the following is not a function?

A. {(x, y) : x, y R, x2 = y}

B. {(x, y) : x, y R, y2 = x}

C. {(x, y) : x, y R, x = y3}

D. {(x, y) : x, y R, y = x3}

Answer :

A function is said to exist when we get a unique value for any value of x..

Therefore, option B is correct.. is not a function as for each value of x, we will get 2 values of y..which is not as per the definition of a function..

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