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Find each coefficent described.
Coeffecient of y^3 in expression of (2y+1)^6
 one year ago
 one year ago
Find each coefficent described. Coeffecient of y^3 in expression of (2y+1)^6
 one year ago
 one year ago

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mathmateBest ResponseYou've already chosen the best response.1
The general expansion of (a+b)^n is given by C(n,0)a^n + C(n,1)a^(n1)b + C(n,2)a^(n2)b^2 +... C(n,n)b^n where C(n,r) is the "n choose r" function, C(n,r)=n!/(r!(nr)!) In the given case, to get the coefficient of y^3, a=2y b=1, n=6, r=3 C(6,3)(2y)^3(1)^(63) =6!/(3!3!)2^3 y^3 1^3 =20*8y^3 =160y^3
 one year ago

Geometry_HaterBest ResponseYou've already chosen the best response.0
Thanks though this is kinda confusing to me.
 one year ago
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