Wilson Parry
07/29/2023 · Elementary School
\( F ( x ) = 2 x ^ { 2 } - 3 x \quad \ln x = 3 \)
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Step-by-step Solution
To solve the equation \( F(x) = 2x^2 - 3x \) given that \( \ln x = 3 \), we first need to find the value of \( x \) from the logarithmic equation.
Starting with the equation:
\[
\ln x = 3
\]
We can exponentiate both sides to solve for \( x \):
\[
x = e^3
\]
Now that we have \( x \), we can substitute it into the function \( F(x) \):
\[
F(e^3) = 2(e^3)^2 - 3(e^3)
\]
Calculating \( (e^3)^2 \):
\[
(e^3)^2 = e^{6}
\]
Now substituting this back into the function:
\[
F(e^3) = 2e^{6} - 3e^{3}
\]
Thus, the value of \( F(x) \) when \( \ln x = 3 \) is:
\[
F(e^3) = 2e^{6} - 3e^{3}
\]
This is the final expression for \( F(x) \) given \( \ln x = 3 \). If you need a numerical approximation, you can calculate \( e^3 \) and \( e^6 \) using a calculator.
Quick Answer
\( F(e^3) = 2e^{6} - 3e^{3} \)
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