作业帮log(2)^3*log(3)^4 过个寒假全忘了···速度~
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log(2)^3*log(3)^4 过个寒假全忘了···速度~
log(2)^3*log(3)^4 过个寒假全忘了···速度~
log(2)^3*log(3)^4 过个寒假全忘了···速度~
换底公式
=(lg3/lg2)(lg4/lg3)
=lg4/lg2
=2lg2/lg2
=2
log2(3)*log3(4)
=lg3/lg2*lg4/lg3
=lg(2^2)/lg2
=2lg2/lg2
=2
用换底公式
2
log2^3*log3^4=1/log3^2*2log3^2=2
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log(2)^3*log(3)^4 过个寒假全忘了···速度~
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