即当x= a2-b2,y=2ab,z=a2+b2 时,可构造出 x2+y2=z2 整解关系[1]。这里的平方整数解的求 算受a、b 两个条件制约,定值实践起来非常困难。定 a 公式直求法,为平方整数解问题带 来了新思维。 2.推验前人的研究成果; 直角三角形 a2+b2=c2 整数解的 a 值奇、偶数列定理是平方整数解性质...
Expressing (a2 + b2 + c2 + d2)3 as a sum of 23 sixth powers. J. Combin. Theory Ser. A 68 (1994), 481-485.R. H. Hardin and N. J. A. Sloane, Expressing (a2 + b2 + c2 + d2)2 as a Sum of 23 Sixth Powers, Journal of Combinatorial Theory, Series A, 68 (1994), 481...
问我对这个excel公式=IF(A2:J2=O2，“是”，“否”)有一些问题EN我如何才能摆脱这个问题，只在一个...
EN我有一个从C2开始的下拉列表，有3个字符串可供选择，列表本身在sheet2上，我需要一些东西，如果sheet...
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MOD(ROW(A1),2)=0,INDEX(B:B,ROW(A1)/2,1,1),"")Sub Macro1()Dim x As IntegerDim y As Integer'B列有多少行，就把下面的20改成多少For x = 1 To 20y = x * 2If Range("B" & x) = "" ThenElseRange("A" & y).SelectSelection.Formula = "=B" & xEnd IfNext x...
//answers.microsoft.com/fr-fr/outlook_com/forum/all/comment-choisir-laffichage-du-dossier-contacts/570c0ca0-89c9-4b53-87c2-d31cb82ef19b 2025-04-26T15:31:43.1110000Z https://answers.microsoft.com/pt-br/msoffice/forum/all/abrir-varios-arquivos-excel-em-telas-separadas/a362bbb2-3270-433...
If the equation of the locus of a point equidistant from the points(a1,b1)and(a2,b2)is(a1−a2)x+(b1−b2)y+c=0, then the value ofcisaa2−a22+b12−b22√a12+b12−a22−b2212(a12+a22+b12+b22)12(a22+b22−a12−b12) ...
A process for forming a deposited film, which comprises introducing, into a film forming space for forming said deposited film on a substrate, compounds A-1 and B-1 respectively represented by following general formulae and employed as r... S Ishihara,S Ohno,M Kanai,... - US 被引量: ...
品名: NP-B2 Chemical Formula: C8H6BrNO4Exact Mass: 258.9480Molecular Weight: 260.0430|methyl…… 尼拉帕尼-B1 目录号: PI000211 品名: NP-B1 Chemical Formula: C9H9NO4Exact Mass: 195.0532Molecular Weight: 195.1740|methyl 3…… 尼拉帕尼-A3 ...