(1/0!)+(1/1!)+(1/2!)+(1/3!)+......无限加下去结果是?
自然对数 e = 2.71828....
e^x = 1 + x/1! + x^2/2! + x^3/3! + .... + x^n/n! + .....
取 x = 1 则有
e = 1/0! + 1/1! + 1/2! + 1/3! + .... + 1/n! + ....
自然对数 e = 2.71828....
e^x = 1 + x/1! + x^2/2! + x^3/3! + .... + x^n/n! + .....
取 x = 1 则有
e = 1/0! + 1/1! + 1/2! + 1/3! + .... + 1/n! + ....