2、 ln与log均为对数的表示方式，可互相转换。ln指自然对数，底数为e；log通常指以10为底的常用对数，也可泛指以任意正数（不等于1）为底的对数。二者之间满足转换关系：logN等于lnN除以ln10，而lnN等于logN除以loge，通过这些公式可实现两种对数形式的换算。

👉 Learn how to evaluate natural logarithms. Recall that the logarithm of a number says a to the base of another number say b is a number say n which, when raised as a power of b, gives a. (i.e. log ...