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Sagot :
Answer:
x = 1/2
Step-by-step explanation:
9^x -1 = 2
Add 1 to each side
9^x = 2+1
9^x = 3
Rewriting 9 as 3^2
3^2x = 3
3^2x = 3^1
The bases are the same so the exponents must be the same
2x =1
2x/2 =1/2
x = 1/2
Answer:
[tex]9 {}^{x} - 1 = 2 \\ 9 {}^{x} = 2 + 1 \\ 9 {}^{x} = 3 \\ 3 {}^{2(x)} = 3 \\ 3 {}^{2x} = 3 {}^{1} \\ since \: the \: \: bases \: are \: the \: same \\ 2x = 1 \\ x = \frac{1}{2} [/tex]
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