• 化简(log43+log83)(log32+log92)= .试题及答案-填空题-云返教育

    • 试题详情

      化简(log43+log83)(log32+log92)=         

      试题解答


      5
      4

      解:(log43+log83)(log32+log92)=(
      1
      log34
      +
      1
      log38
      )(
      1
      log23
      +
      1
      log29
      )=(
      1
      2log
      2
      3
      +
      1
      3log
      2
      3
      )(
      1
      log
      3
      2
      +
      1
      3log
      3
      2
      )=
      5
      6log32
      ×
      3
      2log23
      =
      5
      4

      故答案为:
      5
      4
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