csat-suneung 2021 Q22

csat-suneung · South-Korea · csat__math-humanities 3 marks Binomial Theorem (positive integer n) Find a Specific Coefficient in a Single Binomial Expansion

Find the coefficient of $x$ in the expansion of $( 3 x + 1 ) ^ { 8 }$. [3 points]

Find the coefficient of $x$ in the expansion of $( 3 x + 1 ) ^ { 8 }$. [3 points]