AA×BB=CCDD A=?B=?C=?AA×BB=CCDD A=?B=?C=?D=?
AA×BB=CAAC,DD×EE=DFFD,BB×BB=AAFF,A+B+C+D+E+F=?
aa-ab-bb=0 求a/b=?
梯形,AA'∥BB'∥CC'∥DD',且AB=BC=CD,A'B'=B'C'=C'D,AA'=3,
设a,b,c是△ABC的三条边,且a−bb=b−cc=c−aa
AA*AA=BBCC,AA*BB=CCDD
长方体ABCD-A’B’C’D’中,AB=BC=2a,AA’=a,M,N分别是A’B’,BB’的中点,求AD’与MN所成
证明a(bb+cc)+b(cc+aa)+c(aa+bb)>6abc
aa*bb=caac,dd*ee=dffd,bb*bb=aaff,求a+b+c+d+e+f=
AA*BB=CAAC,DD*EE=DFFD,BB*BB=AAFF求A+B+C+D+E+F
(aa-bb)(aa-bb)/(a-b)(a-b)
AA+BB+CC=ABC,A,B,C等于多少?
a/b=2,求(aa-ab+bb)/(aa+bb)