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OpenStudy (algtrigcalc):
please help! if the coefficients of the third and thirteenth terms in the expansion (r+s)^n are equal, find the middle term.
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OpenStudy (mathstudent55):
If those coefficients are equal, how many terms are there altogether?
OpenStudy (algtrigcalc):
14? @mathstudent55
zepdrix (zepdrix):
|dw:1474846517709:dw|There are two terms before the third term, so there should be two terms after the thirteenth, ya?
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