gaokao 2015 Q11

gaokao · China · sichuan-science Binomial Theorem (positive integer n) Find a Specific Coefficient in a Single Binomial Expansion

11. In the expansion of $( 2 x - 1 ) ^ { 8 }$, the coefficient of the term containing $x^4$ is $\_\_\_\_$ (answer with a number).

11. In the expansion of $( 2 x - 1 ) ^ { 8 }$, the coefficient of the term containing $x^4$ is $\_\_\_\_$ (answer with a number).