Logarithms and Exponents

Introduction

To deal with derivatives and integrals of logs and exponents, you must learn and obey the following rules. Practice is the best way to improve.

ln = the natural log is a log with base picture

picture is saying that picture 

picture it is approximately 2.718281828

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assuming picture

ln of a negative number is impossible as you can’t raise e (or any positive number) to a number and get a negative or 0 resultant.

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picture

assuming picture

picture is the area under the curve picture

Algebra Properties of logs:
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e and ln being inverses, note picture

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multiplication in logs becomes addition

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exponents in logs becomes a coefficient

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a negative exponent is a negative coefficient

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division in logs becomes subtraction

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e and ln are inverses

For example, find x if
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