What is the coefficient of x^6 in the expansion (1+x+x^2)^9. Explain please

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- April 6th 2010, 01:15 PMranyengCoefficient in the expansion
What is the coefficient of x^6 in the expansion (1+x+x^2)^9. Explain please

- April 6th 2010, 01:46 PMPlato
- April 6th 2010, 02:00 PMranyeng
Can you please explain with the above example( better if you write the steps)

- April 6th 2010, 02:05 PMPlato
- April 6th 2010, 02:43 PMawkward