在讲到对数函数的时候,人教版必修一有这样一句话:“另外,在科学技术中常使用以无理数e=2.71828…为底数的对数,以e为底的对数称为自然对数(natural logarithm),并且把logeN记为lnN.”很多心细的同学对这句话充满了好奇.对于无理数π,同学们已经非常的熟悉,它的历史可以追溯到古代,而无理数e的历史不过400年左右.数字π起源于一个几何 When it comes to logarithmic functions, the PEP compulsory one such sentence: “In addition, in science and technology often use the irrational number e = 2.71828 ... the base of the logarithm of the e-base of the logarithm of natural Natural logarithm, and logeN as lnN. ”A lot of careful students are curious about this sentence. For the irrational number π, the students are already very familiar with its history goes back to the ancient, irrational number e The history is only about 400 years, however, and the number π originates from a geometry