? asked in 科學數學 · 1 decade ago

2(ln 8 − ln 4) = ln 4 對嗎?

2(ln 8 − ln 4) = ln 4 對嗎?

3 Answers

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  • 庭耀
    Lv 5
    1 decade ago
    Favorite Answer

    2(ln 8 − ln 4) = ln 4是對的

    2(ln8-ln4)=2ln(84)=2ln2=ln2^2=ln4

    其中用到ln a - ln b=ln (ab)

    n ln a = ln a^n

    2009-04-12 14:51:07 補充:

    上面的除法都不見了

    重貼一次

    2(ln 8 − ln 4) = ln 4是對的

    2(ln8-ln4)=2ln(8除以4)=2ln2=ln2^2=ln4

    其中用到ln a - ln b=ln (a除以b)

    n ln a = ln a^n

  • linch
    Lv 7
    1 decade ago

    是對的!

  • 1 decade ago

    2(ln 8 − ln 4)

    = ln 16 - ln 8

    = ln 8

    應該是錯吧

    Source(s): 我笨我笨我笨笨笨
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