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Binomial Expansion C2

Hey,

Im really stuck on the wordding and the answer for june 2005 paper q4b

anyhelp?

http://www.mathsgeeks.co.uk/allpapers/C2/C2EdexcelJune05QP.pdf
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Original post by needmathshelp123
Hey,

Im really stuck on the wordding and the answer for june 2005 paper q4b

anyhelp?

http://www.mathsgeeks.co.uk/allpapers/C2/C2EdexcelJune05QP.pdf


(1+px)12=1+12px+(12)(11)px22(1+ px)^12 = 1 + 12px + \frac{(12)(11)px^2}{2}

So you know that 12p=q12p = -q and 12×11×p2=11q\frac{12 \times 11 \times p}{2} = 11q now solve for p and q.

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