QuestionAugust 27, 2025

Select the correct answer. What is the solution to this equation? 9^x-1=2 A. 1 B. -(1)/(2) C. 2 D. (1)/(2)

Select the correct answer. What is the solution to this equation? 9^x-1=2 A. 1 B. -(1)/(2) C. 2 D. (1)/(2)
Select the correct answer.
What is the solution to this equation?
9^x-1=2
A. 1
B. -(1)/(2)
C. 2
D. (1)/(2)

Solution
4.1(240 votes)

Answer

D. \frac {1}{2} Explanation 1. Isolate the exponential term Add 1 to both sides: 9^x = 3. 2. Solve for x using logarithms Take the logarithm base 9 of both sides: x = \log_9{3}. 3. Simplify the logarithm Use the change of base formula: x = \frac{\log{3}}{\log{9}} = \frac{1}{2}.

Explanation

1. Isolate the exponential term<br /> Add 1 to both sides: $9^x = 3$.<br />2. Solve for x using logarithms<br /> Take the logarithm base 9 of both sides: $x = \log_9{3}$.<br />3. Simplify the logarithm<br /> Use the change of base formula: $x = \frac{\log{3}}{\log{9}} = \frac{1}{2}$.
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