Asked by Kat
How many coefficients in the binomial series expansion of (1+x)^7 are divisible by 7?
Answers
Answered by
Reiny
From Pascal's triangle or from evaluating
C(7,0), C(7,1) ... we know the coefficients are
1 7 21 35 35 2 1 7 1 , so I count 6 of them
C(7,0), C(7,1) ... we know the coefficients are
1 7 21 35 35 2 1 7 1 , so I count 6 of them
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