lna+lnb ???? lna-lnb - ????
...lna-lnb=ln(a/b) ???? ????????????ax=N?a>0??a?1?????x???a??N??????x=logaN????a??N??????a????????N?????...
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???a=e^lna?????????????? - ????
...???a=e^lna???????????????????????????????????????????????????????log?a?b??a???b??????????????a^x=b??????x=log?a?b...
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ln(a/b)=lna-lnb ln(ab)=lna+lnb???? - ????
...?????????? ???????????????????????????????????????? ln(a/b) = ln(a) - ln(b)?...
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ln(a+b)??lna+lnb?? - ????
...ln(a+b)??lna+lnb???????ln(a+b)?lna+lnb???????????lna+lnb=ln(ab)???a+b=ab???????????????a=b=2.??lnx???????????????????e????????...
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lna?lnb????? - ????
...lna×lnb=ln(a+b)? log????????n???????????????????????????????????10?100?1000? 2?4?8??????????????????????????...
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ln??????? - ????
...ln???????ln?????????????????1.ln(x)???e???x??????e??2.71828?...
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???a?x????e?xlna?? - ????
...2007-07-14 a?x??,?????e?x*lna 3 2018-11-01 ???????a?x??-1??????xlna 128 2019-10-06 a?x??-1???xlna??????RT???????? 3 2017-02-17 ???a=e^lna?????????????? 93...
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ln X??????? - ????
...ln X???????x ln (x) -x +C,(C?????)???????? ln (x) dx=x ln (x) -? x d [ ln(x) ]=x ln(x) -? x *(1/x) dx=x ln (x) -? dx=x ln (x) -x +C,(C?????).???????????1??...
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logae=1?lna???????? - ????
...logae=1?lna???????????????????? ????? logae * ln a =1? ? logae = t, ? e = a^t, ???????????e???? ln e = ln a^t, ? 1= t * ln a, ?t??logae?? logae * l...
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ln(a+b)???? - ????
...Ln(a + b) = Lna * Ln[1 + (b/a)] = Lnb * Ln[1 + (a/b)] ???????e?????????lnN(N>0)?????????????????????????????lnx????????logx???????????????10?????lgx??????????ex?...
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