已知x与y满足2(x-y)-(x-3y)=1/2,求4X次方·2y次方·2y次方-2 2x+1次方·4y次方的值.

∧∞∧ 2023-03-20 05:44

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  _Fashion_yoyo

  2023-03-20 05:58

  2(x-y)-(x-3y)=1/2

  2x-2y-x+3y=1/2

  ∴x+y=1/2

  4的x次方×2的y次方×2的y次方-2×2的2x次方×2的2y次方

  =2的2x次方×2的2y次方-2×2的2x次方×2的2y次方

  =-2的(2x+2y)次方

  =-2的2(x+y)次方

  =-2
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