一道数学题,要过程
若X1+X2=3,X1X2=5求值(1)1/(X1²)+1/(X2²)(2)|X1-X2|(3)[(X2/X1)+1]+[(X1/X2)+1]...
若X1+X2=3,X1X2=5求值
(1)1/(X1²)+1/(X2²)
(2)|X1-X2|
(3)[(X2/X1)+1]+[(X1/X2)+1] 展开
(1)1/(X1²)+1/(X2²)
(2)|X1-X2|
(3)[(X2/X1)+1]+[(X1/X2)+1] 展开
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