8.5 part 1 - c Why on earth would we want to do that? c...

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1 Section 8.5 Solving Exponential and Logarithmic Equations Objectives c Use a calculator to approximate logs c Solve exponential equations by taking the log of both sides The Change of Base Formula c Now you can use your calculator to approximate logs. c For any positive numbers M, b, and c , with b 1 and c 1, b M M c c b log log log = Use a calculator to approximate each of the following expressions. 112 log 3 7 log 2 Goals for solving an exponential equation c We need to get the base and the power alone first c Then we’ll take the log of both sides
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Unformatted text preview: c Why on earth would we want to do that? c There are two ways you can take the log of both sides. Ill show you both! c DO NOT ROUND UNTIL THE VERY END c Why? 2 Using Common logs 68 5 2 = x The same problem using a different base 68 5 2 = x Exact answer__________ Approximation: ________ Solve 20 1 3 6 =-z Solve 14 4 1-=-y Solve 107 10 8-= x 144 20 1 2 =-x Homework c P 449 33-35 & 58-60 c P 456 (1-25 odd) c On 11-17, ignore the part about changing it to base 8...
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8.5 part 1 - c Why on earth would we want to do that? c...

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