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BINOMIAL THEOREM Consider the following expression : ( a + x )n= ( a + x )( a + x ).............. n times ( where n is a positive integer ) First take all a's from the n bracketed terms and no x's from any other terms. This can be done only in 1 way or nC0 way. Take one x from the ' n ' bracketed terms and multiply it by the remaining (n-1) a's from the other (n-1) bracketed terms. Now one x can be selected from the n bracketed terms in nC1 ways. Similarly, take two x from the ' n ' bracketed terms and multiply it by the remaining (n-2) a's from the other (n-2) bracketed terms. Now two x can
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submitted by titun (1529 m) on 20 Jul 2007 18:34:12 IST (16 comments 818 views)
