x+1/x =2 x2+1/x 2=?x+1/x =2 x2+1/x 2=?
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x+1/x=2x2+1/x2=?x+1/x=2x2+1/x2=?x+1/x=2x2+1/x2=?x+1/x=2x2+1/x2=?x+1/x=2x2+1/x2=?x+1/x=2x2+1/x2=?(x+1
x+1/x =2 x2+1/x 2=?x+1/x =2 x2+1/x 2=?
x+1/x =2 x2+1/x 2=?
x+1/x =2 x2+1/x 2=?
x+1/x =2 x2+1/x 2=?x+1/x =2 x2+1/x 2=?
(x+1/x)²=4
x²+2+1/x²=4
x²+1/x²=2
第一题
-2或者1
第二题
没看懂
145/12
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