If P(x) is a polynomial with integer coefficients and a,b,c are three distinct integers, then show that it is impossible to have P(a)=b, P(b)=c, P(c)=a.
Answer
Hint: b−c is divisible by a−b, and ...
I have injection f:A→B and I want to get bijection. Can I just resting codomain to f(A)? I know that every function i...
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