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4.4 Exponential and Logarithmic Equations.notebook November 10, 2016 4.4: Exponential and Logarithmic Equations Date: 11/10 An Exponential Equation is an equation containing a variable in an exponent Examples: *Some exponential equations can be solved by expressing each side of the equation as a power of the same base *All exponential functions are one‐to‐one ‐ no two different ordered pairs have the same second component. So, if and 1 4.4 Exponential and Logarithmic Equations.notebook November 10, 2016 Ex 1: Solve each equation by expressing each side as a power of the same base: a) b) 2 4.4 Exponential and Logarithmic Equations.notebook November 10, 2016 *Most exponential equations cannot be written so that each side has the same base. Using Logarithms to Solve Exponential Equations: Step 1: Isolate the exponential expression. Step 2: Take the natural logarithm of both sides of the equation for bases other than 10. Take the common logarithm on both sides for base 10. Step 3: Simplify using one of the following properties: Step 4: Solve for the variable. 3 4.4 Exponential and Logarithmic Equations.notebook November 10, 2016 Ex 2: Solve: a) b) 4
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