Good evening;
Let α,β∈R, n∈N. Please can you help me to prove that every polynomial of the form
f(x)=xn+3+αx+β
admits at most 3 reals roots. Thank you for help.
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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