.化简..求值..5-x 16----- / ( x+3 - ----- )x-3 x-3__x=\/2 - 5晕了..全乱了..我重新补个..(5-x)/(x-3)/[x+3-16/(x-3)]其中x=根号2减5
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![.化简..求值..5-x 16----- / ( x+3 - ----- )x-3 x-3__x=\/2 - 5晕了..全乱了..我重新补个..(5-x)/(x-3)/[x+3-16/(x-3)]其中x=根号2减5](/uploads/image/z/3936452-68-2.jpg?t=.%E5%8C%96%E7%AE%80..%E6%B1%82%E5%80%BC..5-x+16-----+%2F+%28+x%2B3+-+-----+%29x-3+x-3__x%3D%5C%2F2+-+5%E6%99%95%E4%BA%86..%E5%85%A8%E4%B9%B1%E4%BA%86..%E6%88%91%E9%87%8D%E6%96%B0%E8%A1%A5%E4%B8%AA..%285-x%29%2F%28x-3%29%2F%5Bx%2B3-16%2F%28x-3%29%5D%E5%85%B6%E4%B8%ADx%3D%E6%A0%B9%E5%8F%B72%E5%87%8F5)
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.化简..求值..5-x 16----- / ( x+3 - ----- )x-3 x-3__x=\/2 - 5晕了..全乱了..我重新补个..(5-x)/(x-3)/[x+3-16/(x-3)]其中x=根号2减5
.化简..求值..
5-x 16
----- / ( x+3 - ----- )
x-3 x-3
__
x=\/2 - 5
晕了..全乱了..
我重新补个..
(5-x)/(x-3)/[x+3-16/(x-3)]
其中x=根号2减5
.化简..求值..5-x 16----- / ( x+3 - ----- )x-3 x-3__x=\/2 - 5晕了..全乱了..我重新补个..(5-x)/(x-3)/[x+3-16/(x-3)]其中x=根号2减5
(5-x)/(x-3)/[x+3-16/(x-3)]~~~~分子、分母同时乘于x-3
=(5-x)/(x^2-25)=-1/(x+5)
x=根号2减5,所以原式=-1/2*根号2
(5-x)/(x-3)
------------
x+3-16/(x-3)
5-x
------------
x+3)(x-3)-16
5-x
-------
x^2-25
-1(x-5)
--------------
(x+5)(x-5)
-1
-------
x+5
-1
-----
√2
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