Weak-1:Preliminaries and Real-number system, complex numbers.

Introduction:


Number Systems:


In the very beginning, human life was simple. An early ancient herdsman compared sheep (or cattle) of his herd with a pile of stones when the herd left for grazing and again on its return for missing animals. In the earliest systems probably the vertical strokes or bars such as l, ll, lll, llll etc.,where used for numbers 1, 2, 3, 4.,etc. The symbol "lllll" was used by many people including the ancient Egyptians for the number of fingers of one hand. 

Around 5000 B,C, the Egyptians had a number system based on 10.

Objectives:


  1. Write sets using set notation.
  2. Use number lines.
  3. Know the common sets of numbers.
  4. Find additive inverses.
  5. Use absolute value.
  6. Use inequality symbols.
  7. Graph sets of real numbers