I have the following statement -
If ∑∞1a2n converge then ∑∞1a3n converge.
Well i know this statement is true , but if can someone explain why
lim implies that \lim_{n\rightarrow\infty}(a_{n}) = 0
(a fact that help to prove this statement) , Thanks!
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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