大一行列式只要帮我指出问题所在就OK了1+x 1 1 1 C2-C1 1+x 1 1 1 r1-r2 x 0 0 01 1-x 1 1 ====== 1 -x 1 1 ==== 1 -x 1 11 1 1+y 1 1 0 1+y 1 1 0 1+y 11 1 1 1-y 1 0 1 1-y 1 0 1 1-y-x 1 1 1+y 1=(-1)^(1+1) 0 1+y 1 =(-1)^(1+1) =
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