convex quadrilateral ABCD has AB=9 and CD=12 .Doagonals AC__and BD__intersect at E, AC=14,and triangle AEDand triangle BEC have equal areas. What is AE?
__代表线段 谢谢。。
__代表线段 谢谢。。
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For k>0, let Ik=10...064,where there are k zeros between the I and the 6.Let N(k)be the nimber of factors of 2 in the prime factorization of Ik.What is maximim value of N(k)??
I k
I k
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Rectangle ABCD has AB=4 and BC=3.Segment EF is constructed through B so that EF__ _|_ DB__ ,and A and C lie on DE__and DF__,respectively.What if EF?
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