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when toggle format what by license comment
Jun 14, 2023 at 3:20 answer added RobPratt timeline score: 3
Jun 13, 2023 at 21:09 comment added gthev Oh thanks ! Sorry for the silly question...
Jun 13, 2023 at 16:52 comment added ho boon suan Write $i{k\choose i}=k{k-1\choose i-1}$ and you can use Vandermonde.
S Jun 13, 2023 at 16:40 review First questions
Jun 13, 2023 at 17:11
S Jun 13, 2023 at 16:40 history asked gthev CC BY-SA 4.0