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Nnesha (nnesha):
is it right
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OpenStudy (anonymous):
yes but it hurt my eyes too too much work
Nnesha (nnesha):
hahaha what is the shortest way to do it
OpenStudy (anonymous):
\[_{18}C_{12}=_{18}C_{6}=\frac{\overbrace{18\times 17\times 16\times 15\times 14\times 13}^{\text{six terms}}}{6!}\]
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