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OpenStudy (anonymous):
Evaluate
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OpenStudy (anonymous):
|dw:1344502015404:dw|
OpenStudy (lgbasallote):
do you know what 9! and 7! equal to?
OpenStudy (anonymous):
362880 5040 =72?
OpenStudy (lgbasallote):
right
OpenStudy (lgbasallote):
that was oddly quick
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OpenStudy (anonymous):
\[\frac{9*8*7*6*5*4*3*2*1}{7*6*5*4*3*2*1}\] what can you cancel from top and bottom?
OpenStudy (unklerhaukus):
\[\frac{9!}{7!}=\frac{9\times8\times7!}{7!}=9\times8\]
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