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  • 13-10-2017
  • Mathematics
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Find the 5th term of the expansion of (x + y)9.

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Аноним Аноним
  • 13-10-2017
(r + 1)th term of (x + y)^n  = nCr x^(n-r)y^r

so here we have  9C4 x^(9-4)y^4

=  126x^5y^4  Answer
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