SOLUTION: find the coffecient of the x^8y^3 term in teh expersion of (-x+y)^11..plz help me

Question 414903: find the coffecient of the x^8y^3 term in teh expersion of (-x+y)^11..plz help me
Found 2 solutions by stanbon, sudhanshu_kmr:
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
find the coefficient of the x^8y^3 term in the expansion of (-x+y)^11
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11C8(-x)^8y^3
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165x^8y^3
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Coefficient: 165
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Cheers,
Stan H.
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Answer by sudhanshu_kmr(1152) (Show Source): You can put this solution on YOUR website!

using binomial expansion......
the term with x^8y^3 is 11C8(-x)^8* y^3
so coeffecient is 11C8 *(-1)^8 = 165

so, answer = 165