Log

• 4^3=64

  log 4 (64) = 3

  base, answer, expo
• log x = base 10
• basic log prop:

  same base and ans = 1

  log 3 (3) = 1

  any base .>0 with answer 1 = 0

  log3 (1) = 0

  b log b X =x

  b ( constant) and base the same

  5log5 10 = 10

  logb b^x = x

  log2 (2)^4 = 4
• Logb (X) = y

  equation:

  b^y = x
• Dom;

  set to x>0

  R:

  all real numbers

  x and y int

  zeroes = x int
• VA

  set argument to zero

  ex. log x-2

  (x-2)= 0

  x=2