Define a relation T from R to R as follows: For all real numbers x and y (X,y) E T means that y^2- x^2= 1. Is T a function? Explain
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The relation T: A->B is called a function if and only if
In the given case we have T:R->R: (x, y) T
As we can see, for x = 0 y can be both 1 and -1, so the condition of the function doesn't met. T is not a function