3 October 2014

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16 April 2014

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10 November 2013

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9 November 2013

• curprev 21:3521:35, 9 November 2013 Fadebekun talk contribs 268 bytes +268 Created page with "==Problem== When <math>\left ( 1 - \frac{1}{a} \right ) ^6</math> is expanded the sum of the last three coefficients is: <math> \textbf{(A)}\ 22\qquad\textbf{(B)}\ 11\qquad\text..."