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This topic introduces logarithms and exponential equations. Logarithms are used to solve exponential equations, and so are used along with exponential functions when modelling
•explain what is meant by a logarithm •state and use the laws of logarithms •solve simple equations requiring the use of logarithms. Contents 1. Introduction 2 2. Why do we study logarithms ? 2 3. What is a logarithm ? if x = an then log a x = n 3 4. Exercises 4 5. The first law of logarithms log a xy = log a x+log a y 4 6. The second ...
We have the following de nition of logarithms: What does it mean? First of all the assumptions (restrictions) are important. The number a, called the base of the logarithm, has to be greater than 0 and cannot be equal to 1. The number b (which we take the logarithm of) has to be greater than 0. 6).
What are some of the characteristics of the graph of a logarithmic function? other than 1, has an inverse function that you can denote by g(x) = logb x. This inverse function is called a logarithmic function with base b. Work with a partner. Find the value of x in each exponential equation. Explain your reasoning.
Chapter 17 Logarithms Sec. 1 Definition of a Logarithm In the last chapter we solved and graphed “exponential equations.” The strategy we used to solve those was to make the bases the same, set the exponents equal, and solve the resulting equation. You might wonder what would happen if you could not set the bases equal?
Introduction to Logarithms used whole number bases for the logarithms, including base 10, which is called the common logarithm. Another logarithm, the natural logarithm, uses the number e as the base. The number e is a constant, and, like another famous constant π, e is an irrational number.
Chapter 15 Logarithms Sec. 1 Definition of a Logarithm In the last chapter we solved and graphed “exponential equations.” The strategy we used to solve those was to make the bases the same, set the exponents equal, and solve the resulting equation. You might wonder what would happen if you could not set the bases equal?
