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April 2, 2015

April 2, 2015

Posted by **Shane** on Tuesday, August 6, 2013 at 11:50pm.

- maths -
**Reiny**, Wednesday, August 7, 2013 at 12:26am(1-2x)^11

= 1 + 11(-2x) + 55(-2x)^2 + 165(-2x)^3 + ...

= 1 - 22x + 220x^2 - 1320x^3 + ...

so (220)k = -1320

k = -6

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