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math105(½ð±Ò+1): »¶Ó­²ÎÓë»Ø´ðÎÊÌâ 2011-09-06 15:35:40
zhe_summer(½ð±Ò+3): 2011-09-06 22:46:01
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math105(½ð±Ò+1): »¶Ó­²ÎÓë»Ø´ðÎÊÌâ 2011-09-06 15:35:48
zhe_summer(½ð±Ò+2): 2011-09-06 22:46:06
B(A+B)^-1A+A(A+B)^-1A=(B+A)(A+B)^-1A=A
A(A+B)^-1B+A(A+B)^-1A=A(A+B)^-1(B+A)=A
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