How do you use the binomial formula to find the coefficient of the #z^19 q^2# term in the expansion of #(z+2q)^21#?
1 Answer
Jan 19, 2016
Explanation:
The coefficient will be the second term in the twenty-first row of Pascal's triangle (excluding the inside and outside ones).
This can be represented as
Algebraically represented, this is
#(21!)/((2!)(19!))=(21xx20)/2=210#
