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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 ...

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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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