1. Don’t be fooled by the title. I’m just recording my progress and summarizing
  2. Why machine learning? For the future
  3. Why do you want to post, it is difficult to integrate without output, perhaps later posts will be high quality, now is not worth a look
  4. From there, I hope to finish calculus and current algebra by October 1st. I hope I can keep it up and regret not studying it in college!
  5. I am a front-end development engineer, the skills are not good, not bad, not much awesome! In the company, elder brother is basically a person when the whole stack use, usually use React, sometimes even products are elder brother!

Princeton calculus

Functions, Graphs, and Lines

  1. What are functions, rules for converting one object into another
  2. The input to a function is called the domain
  3. The output of the function comes from a collection called the codomain
  4. The range is the set of actual outputs of the function
  5. A function must assign a unique output to each valid input
  6. The range is a subset of the codomain, which is the set of possible outputs, and the range is the set of actual outputs

Interval notation

  1. [1,2] The closed interval is equal to 1<= x <=2;
  2. (1,2) The open interval is equal to 1< x <2;
  3. The half-open interval [2,4] or (2,4),∞ represents the infinite division of plus and minus
  4. Exponential functions and logarithm functions, the main thing to remember is what’s an exponential and what’s a logarithm, an exponential is just a base of how many powers, and a logarithm is just a base of how many powers to get y so a power is just the logarithm of y, only the logarithm of a positive number, right
  5. The vertical test is that if the graph of a function intersects the X-axis perpendicular more than once, the graph is not a true function
  6. The inverse function, a function whose output corresponds to only one input, has an inverse function
  7. The inverse function is equivalent to the cancel function of the function
  8. If the graph of a function intersects the Y-axis perpendicular more than once, the function has no inverse function
  9. How to find the inverse function, write y=f(x), find x=f-1(y).
  10. If the y value of a function corresponds to multiple x values, the inverse function can be found by limiting the domain
  11. The inverse of the inverse is the original
  12. The inverse function f minus 1 of f(x) may not be equal to x for the restricted domain

Ok, this is part of the knowledge I learned today, sorted out, are the basic knowledge of function, is a foundation for subsequent learning, I hope I can adhere to every day!