I'm searching for a way to find the partial sum of a polynomial, is there any way of doing this formulaically instead of just guessing and checking?
For example...
n∑x=1x2=?
or...
n∑x=1(4x2+7x+2)=?
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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