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![[Post New]](/templates/default/images/icon_minipost_new.gif) 24 Mar 2008 14:58:49 IST
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how is
TR+1/TR = n+r-1/r+1
whats this actually ..........i cannot undertand....there r many probs in ml khanna based on this
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24 Mar 2008 15:08:33 IST
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simple thing
for an expression of (a + x) ^ n,
Tr+1/Tr = n C r x ^ (n-r) a ^r / n C r-1 . x ^(n-r+1) . a ^ (r-1)
= n!.(r-1)!(n-r+1)!/ r!.(n-r)!.n! * (a/x)
= n-r+1/r . (a/x)
I dont think this expression is correct : TR+1/TR = n+r-1/r+1
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24 Mar 2008 22:49:44 IST
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ya ur correct but where did that a/x go.............
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24 Mar 2008 22:51:57 IST
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Didnt get u!
a/x is there in my expression....
Last part was pasted from ur post...
Please be clearer.
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24 Mar 2008 22:53:10 IST
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i meant that my question there is mistake and that ur correct........i want to know where the a/x in the 5th lihne go and become r+1
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