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Home  >>  AIMS  >>  Class11  >>  Math  >>  Relations and Functions
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Let A = {–2, –1, 0, 1}, B = {1, 2, 3, 4} and ‘f’ is a subset of A × B, given by f = {(x, y) | x + y =1}. Is ‘f’ a function from ‘A’ to ‘B’? If not, remove minimum number of elements from the set ‘A’, so that ‘f’ may be a function from the new set to ‘B’.

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‘f’ is not a function from ‘A’ to ‘B’. If the element ‘1’ is removed from the set ‘A’, we have the new set {–2, –1, 0} and then ‘f’ becomes a function from the set {–2, –1, 0} to ‘B’.
answered Jun 27, 2014 by thanvigandhi_1
 

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