Question: ( 5 points ) Suppose the function f : R + R + , where R + represents a set of positive reals, is defined

(5 points) Suppose the function f:R+R+, where R+represents a set of positive reals, is defined as f(x)=7x. Prove that the function f is one-to-one correspondence.
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( 5 points ) Suppose the function f : R + R + ,

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