CBSE Class 12-science Answered
solve??????
Asked by | 09 Sep, 2008, 09:19: PM
Expert Answer
n+1cr and ncr+1 both are positive so (k2-3) 0 i.e. | k | 3
and also n+1r and nr+1 ==> nr+1 and r0
(k2-3) = n+1cr / ncr+1 = (n+1) (r+1) / (n+1-r) (n-r)
(n+1) / (n+1-r) 1 and (r+1) / (n-r) (r+1) 1
(k2-3) can be greater then 1 or less then 1 depending on the values of n and r
so option c is incorrect. and a,b,d are right answers.
Answered by | 17 Dec, 2008, 01:11: AM
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