fiNd the Coefficient Of $$x ^ { 8 }$$ In the Power Series of Each of the Function

Short Answer

find the coefficient of $$x ^ { 8 }$$ in the power series of each of the function.
- $$\left( 1 + x ^ { 2 } + x ^ { 4 } + x ^ { 6 } + x ^ { 8 } + x ^ { 10 } \right) ^ { 3 }$$