csat-suneung 2021 Q22

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

Find the coefficient of $x ^ { 2 }$ in the expansion of $\left( x + \frac { 3 } { x ^ { 2 } } \right) ^ { 5 }$. [3 points]

Find the coefficient of $x ^ { 2 }$ in the expansion of $\left( x + \frac { 3 } { x ^ { 2 } } \right) ^ { 5 }$. [3 points]