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March 18th, 2011, 07:29 AM   #1
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right inverse and left inverse

find the cardinility of all right inverse and left inverse


1) f : R to [0,?) , f(x)=x^2
2)g : [0, ?) to R , g(x) = x^2
3) h: R to R ,h(x)=x^2
4) k : R to R ,k(x) =x^2
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