计算行列式的值
|(1-x2)/(1+x2)2x/(1+x2)|
|-2x/(1+x2)(1-x2)/(1+x2)|
计算行列式的值
|(1-x2)/(1+x2)2x/(1+x2)|
|-2x/(1+x2)(1-x2)/(1+x2)|
【正确答案】:| (1-x2)/(1+x2) 2x/1+x2 | |-2x/(1+x2) (1-x2)/(1+x2)| =(1/1+x2)2 |1-x2 2x | |-2x 1-x2| =(1/1+x2)2(1+x2)2=1
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