Question 1 - A-Level Maths

Exam Board	CAIE
Module	P1 (Pure Mathematics 1)
Year	2018
Session	November
Topic	Binomial Theorem (positive integer n)
Type	Binomial with negative or fractional powers of x

1 Find the coefficient of \(\frac { 1 } { x ^ { 2 } }\) in the expansion of \(\left( 3 x + \frac { 2 } { 3 x ^ { 2 } } \right) ^ { 7 }\).