[Solved] Consider function f:AB, where A,BR and fo

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Consider function f:AB, where A,BR and for every xA,f(x)=x2. Is f a bijection if (a) A=B=R ? Why or why not? (b) A=R and B={xR:x0}

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Consider function f:AB, where A,BR and for every xA,f(x)=x2. Is f a bijection if (a) A=B=R ? Why or why not? (b) A=R and B={xR:x0} ? Why or why not? (c) A=B={xR:x0} ? Why or why not

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