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
Logarithm help, Log(base 5)25X?
The answer is 2+log(base5)X. Can somebody explain this please and if they know a website that explains this that would be helpful too, thanks.
Okay nevermind I figured it out, thanks for looking though. IF there is still any good logarithm help sites, could you please put them down, it would be much appreciated.
5 Answers
- mohanrao dLv 71 decade agoFavorite Answer
log[5]25x
=>log[5]25 + log[5] x (since log ab = log a + logb)
=>log[5]5^2 + log[5]x
=>2log[5]5 + log[5]x (since loga^b = b log a)
=>2 + log[5]x (since log of any number to the base of same
number = 1)
- ComoLv 71 decade ago
Let log be understood as log to base 5 :-
log (25 X) = log 25 + log X
log (25X) = 2 + log X
- Joe LLv 51 decade ago
Remember that when you multiply numbers by one another, you ADD their logs.
For example, Log (base 2) 4 = 2
Log (base 2) 8 = 3
Log (base 2)4X8 = Log(base 2)32 = 5
So you can "take your logs apart" and express them as follows:
Log(base 5)25X = Log(base 5) X + Log(base 5) 25
But
Log(base 5)25 = 2
So the answer is
2 + Log(base 5)X
- normanLv 71 decade ago
use the law of log addition
Log nm = log m + log n
log25x = log 25 + log x
log (base 5)25 = log (base 5) 5^2
use the law of log muliplication
Log m^n = n log m
log(base 5)5^2 = 2 log(base 5)5
log(base 5)5 = 1 so that is your ans.
- How do you think about the answers? You can sign in to vote the answer.
- Anonymous4 years ago
i think of maths is all approximately loving.....if u prepare and get alongside with it each and every answer is nearly a puzzle it incredibly is hard yet while u conquer it u could be the happiest guy in the worldwide....
