A.其對(duì)偶的對(duì)偶為原問(wèn)題 B.對(duì)偶變量的符號(hào)取決于原問(wèn)題的約束方程的符號(hào) C.對(duì)偶問(wèn)題的約束條件的符號(hào)取決于原問(wèn)題的決策變量的符號(hào) D.若原問(wèn)題的決策變量X1<0,則其對(duì)偶問(wèn)題的第一個(gè)約束不等式取>號(hào)
A.目標(biāo)函數(shù)為線(xiàn)性B.約束條件為線(xiàn)性C.目標(biāo)函數(shù)與約束條件均為線(xiàn)性D.都不對(duì)
A.主元所在行稱(chēng)為主元行 B.主元所在列稱(chēng)為主元列 C.主元列所對(duì)應(yīng)非基變量為進(jìn)基變量 D.主元素可以為零