Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
Final exam review help?
Sole this exponential equation: 2^8x-5 =1/8
Solve*
1 Answer
- TravelerLv 67 years agoFavorite Answer
2^8x-5 =1/8
I use the rule that a base raised to a power is equal to base "e" raised to the power multiplied by the natural log of the base, like this:
e^((8x-5) ln(2)) = 1/8
Now, take the natural log of both sides:
(8x-5) ln(2) = ln(1/8)
8x -5 = ln(1/8) / ln(2)
8x -5 = -3
8x = = -3 + 5
8x = 2
x = 1/4
