Mathematics, 04.12.2019 06:31, JJ143899
Let r+ denote the set of positive real numbers. let f : r × r+ → r be given by f(x, y) = x/y. (a) is f an injective function? prove your answer. (b) is f a surjective function? again, prove your answer. (c) is f a bijection? prove your answer.
Answers: 1
.
is injective if 
for any two points 
and 
, then the two points must be identical with 
and 
.
for which every point in the codomain 
is obtained by 
.
and can take on any negative real number for any choice of 
if and only if 
for any choice of 
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Let r+ denote the set of positive real numbers. let f : r × r+ → r be given by f(x, y) = x/y. (a) i...
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