Msy_xiaodu的博客

# 创建数组import numpy as npones = np.ones(shape=4)print("ones in 4 dimension",ones)zeros = np.zeros(shape=4)print("zeros in 4 dimension",zeros)ones_float = np.ones(shape=4,dtype=np.float)print("ones float in 4 dimension",ones_float)matrix = np.ones((

等差数列1.定义：an+1−an=d(常数)a_{n+1}-a_n=d(常数)an+1​−an​=d(常数)2.通项公式：an=a1+(n−1)da_n=a_1+(n-1)dan​=a1​+(n−1)d3.变式：an=am+(n−m)dd=an−amn−ma_n=a_m+(n-m)d \quad d = \frac{a_n-a_m}{n-m}an​=am​+(n−m)dd=n−man​−am​​4.前n项各：Sn=(a1+an)n2或Sn=a1n+n(n−1)2dS_n=\fr

等比数列定义：an+1an=q(常数)\frac{a_{n+1}}{a_n}=q(常数)an​an+1​​=q(常数)通项公式：an=a1qn−1a_n=a_1q^{n-1}an​=a1​qn−1变式：an=amqn−manam=qn−ma_n=a_mq^{n-m} \quad \frac{a_n}{a_m}=q^{n-m}an​=am​qn−mam​an​​=qn−m...

1. 基本函数求导公式(1)(C)′=0(2)(xμ)′=μxμ−1(3)(sinθ)′=cosθ(4)(cosθ)′=−sinθ(5)(tanθ)′=sec2θ(6)(secθ)′=secθtanθ(7)(ax)′=axln a(8)(ex)′=ex(9)(logax)′=1xln a(10)(ln x)′=1x′(1) \quad (C)'=0\quad(2) \quad (x^\mu)' = \mu x^{\mu-1}\\(3) \quad (sin\theta)