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SOLVING LOGARITHMIC EQUATIONS

SOLVING LOGARITHMIC EQUATIONS. Yesterday, we learned how to solve for a variable when it is an exponent. So what undoes x when it’s an exponent? y = a∙b x. Get me down!. What do we do if we have a variable trapped in a log?. So what undoes x when it’s an exponent? log 4 x = 78 .

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SOLVING LOGARITHMIC EQUATIONS

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  1. SOLVING LOGARITHMIC EQUATIONS

  2. Yesterday, we learned how to solve for a variable when it is an exponent. So what undoes x when it’s an exponent?y = a∙bx Get me down!

  3. What do we do if we have a variable trapped in a log? So what undoes x when it’s an exponent?log4 x = 78 Get me out of here!

  4. Rewrite it as a exponential function! Iflogby=x ,theny=bx No longer trapped inside the log!

  5. Example 1: Solve log5 x = 2

  6. Example 2: Solve 3log8 x = 3

  7. Example 3: Solve log5 (x-2) = 8

  8. Example 4: Solve log3(x-2)+4 = 8

  9. Example 5: Solve 2log4(x+2) - 5= 3

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