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  • 1、What is the maximum number of cubes with sides of a length that could fit inside a cube with sides of length 2s?

    1、What is the maximum number of cubes with sides of a length that could fit inside a cube with sides of length 2s?
    (A) 8 (B) 16 (C) 32 (D) 64 (E) 128
    可是不知道怎么算出來的
    2、The sum of the lengths of two sides of isosceles triangle K is 7.K has a side of length 4.
    比大小:The perimeter of K和 11
    這道題我知道要分類討論,算出來兩個結(jié)果周長都等于11,那為什么不能選“=”而要選“信息不足,無法比較”?
    3、
    The 20 people at party are divided into N mutually exclusive groups in such a way that the number of people in any group does not exceed the number in any other group by more than 1.
    比大?。篢he value of nif ) at least one of the groups consists of 3 people和6
    英語人氣:747 ℃時間:2020-03-25 18:39:42
    優(yōu)質(zhì)解答
    邊長為2s的立方體,其體積為8s三次方,設(shè)有x個小立方體其邊長為a,此時若要完全填滿則有x*a3=8S3,即x=(2S/a)3,所以x只能為64.等腰三角形兩邊和是7,其中一邊為4,則三角形三遍距離組成可能為3,3,4;4,4,3;3.5,3.5,4,所以...
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