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Logarithms
Module 25 Natural and common logarithms. Also use of change of base formula.
Question | Answer |
---|---|
Using your calculator for the next 5 slides solve the following basic problems. Round to nearest 4th decimal if necessary. log5 | .6991 |
log10 | 1 |
log24 | 1.3802 |
ln5 | 1.6094 |
ln10 | 2.3026 |
Change of Base formula. | If a, b, and C are positive real numbers and neither b nor c is 1. Then, LOG b of a = Log c of a/log c of b |
Examples: Log(base4) of 9= | Log(base)10 of 9 / log(base)10 of 4 =1.5851 |
Log(base)20 of 15 | log(base)10 of 15/ log(base)10 of 20 =.9040 |