csat-suneung 2009 Q9

csat-suneung · South-Korea · csat__math-humanities 4 marks Binomial Theorem (positive integer n) Find a Specific Coefficient in a Single Binomial Expansion
In the expansion of $\left( x + \frac { 1 } { x ^ { 3 } } \right) ^ { 4 }$, what is the coefficient of $\frac { 1 } { x ^ { 4 } }$? [4 points]
(1) 4
(2) 6
(3) 8
(4) 10
(5) 12
In the expansion of $\left( x + \frac { 1 } { x ^ { 3 } } \right) ^ { 4 }$, what is the coefficient of $\frac { 1 } { x ^ { 4 } }$? [4 points]\\
(1) 4\\
(2) 6\\
(3) 8\\
(4) 10\\
(5) 12