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[" 6.If "sum(r=0)^(25){^(50)C(r)*root(5 ...

[" 6.If "sum_(r=0)^(25){^(50)C_(r)*root(5 0 - r)(-r)}=K(^(50)C_(25))," then "K" is "],[" equal to: "],[[" (1) "2^(25)-1," (2) "(25)^(2)," (3) "2^(25)," (4) "2^(24)]]

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