Pregunta
Solve for \( x: \quad \log _{3} x=4 \) \( \begin{array}{llll}\text { a. } 64 & \text { b. } & 81 \\ \text { c. } 243 & \text { d. } & 12\end{array} \)
Ask by Parry Pollard. in the United States
Feb 03,2025
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\( x = 81 \)
Solución
To solve the equation \( \log_{3} x = 4 \), we want to find the value of \( x \) that satisfies this logarithmic equation.
Recall that \( \log_{b} a = c \) is equivalent to \( b^c = a \). Applying this to the given equation:
\[
\log_{3} x = 4 \quad \Rightarrow \quad 3^4 = x
\]
Calculating \( 3^4 \):
\[
3^4 = 3 \times 3 \times 3 \times 3 = 81
\]
So, \( x = 81 \).
**Answer:** b. 81
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Bonus Knowledge
To solve the equation \( \log_{3} x = 4 \), we can rewrite it in exponential form. This means that \( x \) is equal to \( 3^4 \). Since \( 3^4 = 81 \), we find that the value of \( x \) is 81. So, the answer is \( \text{b. } 81 \).
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