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BELL RINGER (IN MATH JOURNAL) What are the laws of exponents? 1. x m x n = 2. x m = x n 3. (xy) n = 4. (x) n = (y) 5. x –n = 6. x 0 = 7. (x m ) n =

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Presentation on theme: "BELL RINGER (IN MATH JOURNAL) What are the laws of exponents? 1. x m x n = 2. x m = x n 3. (xy) n = 4. (x) n = (y) 5. x –n = 6. x 0 = 7. (x m ) n ="— Presentation transcript:

1 BELL RINGER (IN MATH JOURNAL) What are the laws of exponents? 1. x m x n = 2. x m = x n 3. (xy) n = 4. (x) n = (y) 5. x –n = 6. x 0 = 7. (x m ) n =

2 LOGARITHMS Wednesday, April 16, 2014

3  Exponential GRAPHS  Logarithmic

4 INVERSE

5 NOTES The inverse of an exponential function is a logarithmic function. To convert from an exponential to a log –> 2 5 = 32 is log 2 32 = 5 Calculators only do log 10 which is called “common log” So log is really log base 10.

6 PROPERTIES OF LOGS-- NOTES 1) log b mn = log b m + log b n 2) log b m = log b m – log b n n 3) log b m p = p log b m

7 BELL RINGER (IN MATH JOURNAL) 1.How can you convert from exponential to logarithmic form? 2.What base is the log button on your calculator? 3.What are the properties of logs?

8 LOGARITHMIC EQUATIONS Thursday, April 17, 2014

9 NOTES To convert from logarithm to an exponential log 2 32 = 5 → 2 5 = 32

10 SOLVING LOG EQUATIONS 1.If possible, get log of the same bases equal and “drop the log.” 2.If not, then change to exponential form and solve.

11 CHANGE OF BASE


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