Homework #4

Due in lecture, Thursday March 28. Please do the homework in a workbook.

From the Text

Complete the following questions from the text:


  1. Prove or disprove that \(A\cap B \subseteq A\cup B\).
  2. Is it possible that \(A\cap B = A\cup B\)? Give an example or prove that it is impossible.
  3. Determine a formula for the value of \[\sum_{i=1}^{n} \left(x^{i}-x^{i-1}\right)\,.\]