Solve Exponential Equations Using `Ln` Worksheet

Algebra 2
Exponential Functions

Total questions - 6

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How Will This Worksheet on "Solve Exponential Equations Using `ln`" Benefit Your Student's Learning?

  • Using `ln` simplifies challenging exponential equations.
  • Working with `ln` helps us to understand how logs work better.
  • This method improves our algebra skills with logs and exponents.
  • Solving equations with ln makes us better at solving tough math problems.
  • Learning `ln` prepares us for more advanced math like calculus.
  • Successfully solving these equations builds our confidence with tricky math concepts.

How to Solve Exponential Equations Using `ln`?

  • Begin with an equation in the form \( a^x = b \), where \( a \) and \( b \) are constants.
  • Take the natural logarithm `(ln)` of both sides: \( \ln(a^x) = \ln(b) \).
  • Utilize the property \( \ln(a^x) = x \cdot \ln(a) \) to bring the exponent down: \( x \cdot \ln(a) = \ln(b) \).
  • Isolate \( x \) by dividing both sides by \( \ln(a) \): `x = \frac{\ln(b)}{\ln(a)}`.

Solved Example

Q. Solve for x x . \newline7=ex7=e^x \newlineRound your answer to the nearest thousandth.
Solution:
  1. Take Logarithm of Both Sides: 7=ex7 = e^x\newlineTake the natural logarithm (ln) of both sides.\newlineln7=lnex\ln 7 = \ln e^x
  2. Apply Power Property of Logarithms: ln7=lnex\ln 7 = \ln e^x\newlineUse the power property of logarithms.\newlineln7=xlne\ln 7 = x \ln e
  3. Simplify the Equation: ln7=xlne\ln 7 = x \ln e\newlineSince lne=1\ln e = 1, simplify the equation.\newlineln7=x\ln 7 = x
  4. Calculate and Round: ln7=x\ln 7 = x\newlineCalculate ln7\ln 7 and round to the nearest thousandth.\newlinex1.945910149x \approx 1.945910149\newlinex1.946x \approx 1.946
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About Worksheet

Algebra 2
Exponential Functions

To solve exponential equations using \( \ln \) (natural logarithm), take the natural logarithm of both sides to simplify the exponents. This transforms the equation into a linear form that can be easily solved for the variable. For detailed guidance, solving exponential equations using ln step by step provides a thorough walkthrough, and solving exponential equations using ln calculator offers a quick computational tool.

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