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OpenStudy (anonymous):
What is the solution to the equation 7 ^–3x ≈ 9 I have no idea where to start please help
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OpenStudy (ivancsc1996):
First natural log:\[\ln (7^{-3x})=-3x \ln (7)\approx 9 \rightarrow x=-\frac{ 9 }{ 3\ln (7) }=-\frac{ 3 }{ \ln (7) }\]
OpenStudy (anonymous):
Okay
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