极限的证明,
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极限的证明,
lim(x->0) log(1+x) /x (0/0)
=lim(x->0) 1/[lna.(1+x)]
=1/lna
=1/ [ loga /loge ]
=log e
lim(x->0) (a^x -1) /x (0/0)
=lim(x->0) (lna)a^x
=lna
极限的证明,
lim(x->0) log(1+x) /x (0/0)
=lim(x->0) 1/[lna.(1+x)]
=1/lna
=1/ [ loga /loge ]
=log e
lim(x->0) (a^x -1) /x (0/0)
=lim(x->0) (lna)a^x
=lna