Tuesday, 7 May 2019

elementary set theory - What is the cardinality of the set of all infinite sequences?

The set is defined as {(n1,n2,...nk..)|nkN}. What are some approaches to finding and proving the cardinality of this set?

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real analysis - How to find limhrightarrow0fracsin(ha)h

How to find limh0sin(ha)h without lhopital rule? I know when I use lhopital I easy get $$ \lim_{h\rightarrow 0}...