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1. Overview of integer split items 1.1 1 * 2 + 2 * 3 + 3 * 4 + ... + (n - 1) * n = ? Solution:   The split term formula is: (n - 1) * n = [(n - 1) * n * (n + 1) - (n - 2) * (n - 1) * n] / 3 The solution process is shown in the following figure:   1.2 1 * 2 * 3 + 2 * 3 * 4 + 3 * 4 * 5 + ... + (n - 2) * (n - 1) * n = ? Solution:   ...

1 general random variable 1.1 two types of random variables According to the number of possible values of random variables, they are divided into discrete type (finite value) and continuous type (infinite value). 1.2 discrete random variables For discrete random variables, the probability mass function (PMF) is used to describe their di ...

Chapter 7: Exploring the glTF File Format glTF is a standard format that can store both mesh and animation data. a file format that contains everything you need to display animated models. It's a standard format that most three-dimensional content creation applications can export to and allows you to load any arbitrary model. glTF: Graph ...

least square method What is the essence of least squares Taking measuring the length with different rulers as an example, several measured values are obtained. How to determine the true value? "y, which minimizes the sum of squares of errors, is the true value." this is based on the fact that if the error is random, the measured ...

Ordinary Hanoi Tower Interested children's shoes can contact and communicate with me~ Official account: swim the code sea more high quality original articles are inside! The Tower of Hanoi is a mathematical problem based on a legend: There are three poles A, B and C. There are N (N > 1) perforated discs on rod A, and the size of the ...

It's really convenient to use markdown to write documents and support mathematical formulas!!!Step 1: modify the preference settings and check the inline formula optionfile -> Preferences -> Markdown -> Inline formulaAfter setting according to the following figure, we can happily enter the formula in Typora~1, Enter Greek lettersEnter: ...

Code clipping algorithm for line segment For example, many uneven straight-line segments are distributed on a canvas, and we want to find a rectangular window on the canvas and only want to get the straight-line segments in the rectangular window. How should we achieve this? We know that the straight line segment can be expressed by a para ...

Title Link: Where to Run? - LightOJ 1287 - Virtual Judge (ppsucxtt.cn) Topic meaning: there are n cities, numbered 0~n-1, and there are m right undirected edges. The edge right represents the time it takes to pass through this edge. A thief starts from the city numbered 0, and he will not go to the city he has passed. Every time he arrives at ...

meaning of the title seek 16 16 In hexadecimal, n ! n! n! Remove the tail 0 0 ...

Topic Title Link: https://www.luogu.com.cn/problem/P7116 General idea of the topic There is one k k k-dimensional space, second i i The length of dimension i is ...