21-111, Review of algebra, Ch0

Today I had a chance to go through the first (0) chapter from the textbook (Brief Calculus & Its Applications 13th edition by Larry J. Goldstein).

It consisted purely from a school math and precisely

  • Functions and Their Graphs
  • Some Important Functions
  • The Algebra of Functions
  • Zeros of Functions—The Quadratic Formula and Factoring
  • Exponents and Power Functions
  • Functions and Graphs in Applications

I am using most of the material on my daily basis, but it was anyways great to refresh the memory.

The book itself is amazing with great examples and solutions throughout each chapter. I had pleasure scrolling the pages 🙂

The most interesting part so far has been Compound Interest and formula which you can find below.

When money is deposited in a savings account, interest is paid at stated intervals. If this interest is added to the account and thereafter earns interest itself, then the interest is called compound interest. The original amount deposited is called the principal amount. The principal amount plus the compound interest is called the com- pound amount. The interval between interest payments is referred to as the interest period. In formulas for compound interest, the interest rate is expressed as a decimal rather than a percentage. Thus, 6% is written as .06.

If $1000 is deposited at 6% annual interest, compounded annually, the compound amount at the end of the 3rd year will be:

A = 1000(1 + .06)^3 OR A = P * (1 + i)^n

I hope to follow the same pace and complete Chapter by Chapter. That’s all for today!

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