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Mathematics 8 Online
OpenStudy (anonymous):

How to calculate this sum in a faster way?

OpenStudy (theviper):

???

OpenStudy (anonymous):

\[\sum_{10}^{i=1} ( 10Ci)\]

OpenStudy (experimentx):

2^10 - 1

OpenStudy (experimentx):

if it was \[ \sum_{i=1}^{10} \binom {10} i \]

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