Solving an Exponential Equation Example by Walch Education (2)
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UCSS Secondary Math III Unit 4A Lesson 1
This example demonstrates how to solve the exponential equation [math]10^{x – 3} = 208[/math] for [math]x[/math] using GeoGebra. Core mathematical concepts include exponential equations and logarithmic operations. Key GeoGebra commands and objects used are LaTeX for formula display, Corner for interface setup, and stepMax, stepper, steps, counter for step-by-step problem-solving, along with RandomizationText, Original, Randomized for randomization. Suitable for high school students learning to solve exponential equations and applying GeoGebra tools.
GeoGebra Commands & Parameters
LaTeX(steps) → counterLaTeX("\text{Use the buttons below to return to the original problem or}\cr\text{randomly generate a similar practice problem.}") → RandomizationTextCorner(1) → ACorner(3) → BLaTeX((("\text{Add }\textcolor{#000099}{" * subtract) * "}\text{ to both sides.}")) → text9LaTeX((((((("\text{Solve for }\textcolor{#000099}{x}\text{ in the equation }\textcolor{#000099}{" * base) * "^{x-") * subtract) * "}=") * constant) * "}.")) → ProblemLaTeX("\text{Notice that }\textcolor{#000099}{x}\text{ is in the exponent. In order to extract }\textcolor{#000099}{x}\text{ from the}\cr\text{argument of any function, apply the inverse of the function to both sides of the}\cr\text{equation.") → text1LaTeX((((((("\textcolor{#000099}{" * base) * "^{x-") * subtract) * "}=") * constant) * "}")) → text4LaTeX((("\text{Take the logarithm base }\textcolor{#000099}{" * base) * "}\text{ both sides.}")) → text5LaTeX((((((((((("\textcolor{#000099}{log_{" * base) * "}\left(") * base) * "^{x-") * subtract) * "}\right)=log_{") * base) * "}(") * constant) * ")}")) → text6LaTeX((("\textcolor{#000099}{x\approx" * finalans) * "}")) → text10LaTeX((((((((("\text{The value of }\textcolor{#000099}{x}\text{ in the exponential equation }\textcolor{#000099}{" * base) * "^{x-") * subtract) * "}=") * constant) * "}\text{ is approximately }\textcolor{#000099}{") * finalans) * "}.")) → text11LaTeX("\textcolor{#000099}{y=a^x}") → text2_1LaTeX("\text{General form of an exponential equation}") → text3_1LaTeX("\textcolor{#000099}{\log_{a}(y)=x}") → text2_2LaTeX("\text{Rewrite in logarithmic form.}") → text3_2LaTeX("\text{Given exponential equation}") → text3LaTeX((((((("\textcolor{#000099}{\log_{(" * base) * ")}(") * constant) * ")=(x-") * subtract) * ")}")) → text2_3LaTeX("\text{Substitute.}") → text3_3LaTeX((((((("\textcolor{#000099}{\log_{(" * base) * ")}(") * constant) * ")=(x-") * subtract) * ")}")) → text2_5LaTeX("\text{Logarithmic form of the original equation}") → text3_4LaTeX((((("\textcolor{#000099}{(" * ans) * ")\approx x-") * subtract) * "}")) → text8LaTeX("\text{Move the slider to solve the problem.}") → text0LaTeX("\text{An exponential equation of the form }\textcolor{#000099}{y=a^x}\text{ can be rewritten }\cr\text{as a logarithmic equation of the form }\textcolor{#000099}{\log_{a}(y)=x}.") → text2LaTeX((((((((((((("\text{The exponential equation }\textcolor{#000099}{" * base) * "^{x-") * subtract) * "}=") * constant) * "}\text{ can be rewritten as the }\cr\text{logarithmic equation }\textcolor{#000099}{\log_{(") * base) * ")}(") * constant) * ")=(x-") * subtract) * ")}.")) → text2_4LaTeX("\text{Find the common logarithm with}\cr\text{a calculator and substitute.}") → text7
AI Drawing Prompt Reference
Draw the solution to the exponential equation 10^(x-3)=208. First, add 3 to both sides to get 10^x=208*10^3. Then, take the base-10 logarithm of both sides to get x=log10(208*10^3). Finally, use a calculator to find the approximate value of x.
The prompt above was compiled from the original drawing commands and is for reference only.