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log₃8 x log₂49 x log7 27=?
人气:484 ℃ 时间:2020-03-18 01:04:00
解答
log₃8 x log₂49 x log7 27
=lg8/lg3xlg49/lg2xlg27/lg7
=3lg2/lg3x2lg7/lg2x3lg3/lg7
=3x2x3
=18
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