• (1)3√a72√a-3÷√3√a-83√a15÷3√√a-3√a-1(2)(x-1+x+x0)(x-12-x12)试题及答案-解答题-云返教育

    • 试题详情

      (1)
      3a
      7
      2
      a-3
      ÷
      3a-8
      3a15
      ÷
      3
      a-3
      a-1

      (2)(x
      -1+x+x0)(x-
      1
      2
      -x
      1
      2

      试题解答


      见解析
      解:(1)
      3a
      7
      2
      a-3
      ÷
      3a-8
      3a15
      ÷
      3
      a-3
      a-1

      3a
      7
      2
      a-
      3
      2
      ÷
      a-
      8
      3
      a
      15
      3
      ÷
      3a-
      3
      2
      a-
      1
      2

      =
      3a2
      ÷
      a
      7
      3
      ÷
      3a-2

      =
      a
      2
      3
      ÷(a
      7
      3
      )
      1
      2
      ÷(a-2)
      1
      3

      =
      a
      2
      3
      ÷a
      7
      6
      ÷a-
      2
      3
      =a
      2
      3
      -
      7
      6
      ÷a-
      2
      3
      =a-
      1
      2
      ÷a-
      2
      3
      =a-
      1
      2
      +
      2
      3
      =a
      1
      6

      (2)(x
      -1+x+x0)(x-
      1
      2
      -x
      1
      2
      )=(x-
      1
      2
      )3-(x
      1
      2
      )3=x-
      3
      2
      -x
      3
      2
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