Moderate -0.3 This is a straightforward binomial expansion question requiring students to identify which term has x^0 by setting up the general term and solving a simple equation. It's slightly easier than average because it's a single-step application of the binomial theorem with no additional complications, though it does require careful handling of negative powers.
1 Find the term independent of $x$ in the expansion of $\left( x - \frac { 1 } { x ^ { 2 } } \right) ^ { 9 }$.
\hfill \mbox{\textit{CAIE P1 2010 Q1 [3]}}