Prove by induction:
$$\sum\limits_{i=1}^{n}(4i+1) = 2n^2 + 3n$$
It's just the numbers that confuse me; I know how to do a simple induction proof that first for $p(k)$ and then for $k+1$ etc but I don't know how to do it with the form?
Prove by induction:
$$\sum\limits_{i=1}^{n}(4i+1) = 2n^2 + 3n$$
It's just the numbers that confuse me; I know how to do a simple induction proof that first for $p(k)$ and then for $k+1$ etc but I don't know how to do it with the form?
I have injection $f \colon A \rightarrow B$ and I want to get bijection. Can I just resting codomain to $f(A)$? I know that every function i...
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