How are variables in brackets read at different levels, and what does such an expression mean?

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ResearcherV2019-05-03 16:46:20

Mathematics

ResearcherV, 2019-05-03 16:46:20

How are variables in brackets read at different levels, and what does such an expression mean?

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D3lphi, 2019-05-03
@ResearcherV

This entry in English literature denotes the number of combinations . It is read as "the number of combinations from n to l". In Russian-language literature, the designation through C is more common:
a73cf8428fc85510cade14325f0d8a3f460ed0c6

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