Please answer the question attached as image as soon as possible.
supraja venkatraman , 6 Years ago
Grade 11
Algebra> Please answer the question attached as im...
1 Answers
Arun
Last Activity: 6 Years ago
Dear student
it is wriiten in summation form as
sigma (r Cr/ Cr-1) = sigma ( r* (n- r+1/r) = sigma ((n+ 1) – r) = n (n+1) – n(n+1)/2 = n(n+1)/2
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