()-|||-A sum _(k=7)^10(C)_(10)^k((dfrac {1)(2))}^7-|||-B https:/img.zuoyebang.cc/zyb_f0110d74a0029ea8f896c0849bf637ec.jpg-(sum )_(k=0)^k((dfrac {1)(2))}^10-|||-C _(10)^7((dfrac {1)(2))}^7-|||-D.0.7

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