Binomial Theorem Part 1

Section: Mathematics
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Question : 23 of 100
 
Marks: +1, -0
If n≥2 is a positive integer, then the sum of the series ‌n+1C2+2(‌2C2+‌3C2+‌4C2+...+‌nC2) is
[24 Feb 2021 Shift 2]
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