设(Ⅰ)
【正确答案】正确答案:(1)A 1 = (Ⅰ)的基础解系为ξ 1 = ,ξ 2 = A 2 = (Ⅱ)的基础解系为η 1 = ,η 2 = (2)(Ⅰ)的通解为k 1 ξ 1 +k 2 ξ 2 = ,(Ⅱ)的通解为l 1 η 1 +l 2 η 2 = 令k 1 ξ 1 +k 2 ξ 2 =l 1 η 1 +l 2 η 2 ∴(Ⅰ),(Ⅱ)的公共解为
【答案解析】