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Text File  |  1987-08-31  |  1KB  |  41 lines
  1.  
  2.                        Review of Functions and Equations
  3.                        ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀
  4.                                  _________
  5.                             3    ▌              2
  6.          If        f(x) = 2x  + \▌ 5x + 2   + 4x
  7.                                    ___________
  8.                               3    ▌                  2
  9.          then      f(3) = 2(3)  + \▌ 5(3) + 2   + 4(3)
  10.  
  11.                                        _______________
  12.                                   3    ▌                          2
  13.          and   f(x + h) = 2(x + h)  + \▌ 5(x + h) + 2   + 4(x + h)
  14.  
  15.  
  16.  
  17.                          2
  18.          If            ax  + bx + c  =  O    then
  19.                                  ___________
  20.                                  ▌  2
  21.                            -b ± \▌ b  - 4ac
  22.                   x   =   ────────────────────
  23.                                   2a
  24.  
  25. ┌─────────────────┐
  26. │ Common Mistakes │
  27. └─────────────────┘
  28.  
  29.  
  30. WRONG       f(a + b) = f(a) + f(b)     RIGHT  No formula for   f(a + b)
  31.  
  32. WRONG       f(a + b) = f(a) + b        RIGHT  No formula for   f(a + b)
  33.  
  34. WRONG       Solving  x f(x) = O     and forgetting that  x = O is a solution.
  35.  
  36. WRONG       Solving  f(x)/x = O     and thinking that  x = O is a solution.
  37.  
  38.  
  39. This is the end of the help file.  Press the ESC key to return to the quiz
  40. question you were doing.
  41.