Question

Is anybody really good at logs and is willing to help me study for my finals? Please:/

Answer 1

Unfortunately I only have basic knowledge of logarithims, sorry. Good luck finding someone!

Answer 2

Well basic is pretty much what I need help on, I don't want to burden you with helping if you're busy

Answer 3

Just a couple of basic rules,
\(\large\color{black}{ 1)~~~ \log_w(a)+\log_w(b)=\log_w(a\times b) }\) (addition of logs))

\(\large\color{black}{ 2)~~~ \log_w(a)-\log_w(b)=\log_w(a\div b) }\) (difference of logs)

\(\Large\color{black}{ 3)~ \log_cd=\frac{\log(c)}{\log(d)} }\) (change in base)

\(\large\color{black}{ 4)~~~ \log(a)= \log_{10}(a) }\) (unspecified base)

Answer 4

are you familiar with these rules?

Answer 5

#'s 3 & 4 are the rules I recognize

Answer 6

So, you don't know 1 and 2, right?

and Also,
\(\large\color{black}{ 5)~~~ \log_AB=C~~~~\rightarrow~~~~~~A^C=B }\)

\(\large\color{black}{ 6)~~~ \log_w(a^k) =k\log_w(a) }\)

Answer 7

Yes, I've seen those before as well. Is it possible for you to help me on individual questions?

Answer 8

yes.. sure:)

Answer 9

post it here....

Answer 10

\[\left( \frac{ 8 }{ 5 } \right)^{x}=\frac{ 25 }{ 64 }\]

Answer 11

Take log of both sides,
\(\large\color{black}{\log (\frac{8}{5})^x =\log(\frac{25}{64}) }\)

Answer 12

Okay, so I would just have to add the log or do I still need to move things around?

Answer 13

log(8/5) =? (rule 2)

Answer 14

I would have to use difference of logs?

Answer 15

yes.

Answer 16

but, before we do this,
can you bring the exponent on the outside of log?
(referring to rule 6)

Answer 17

That's quite confusing, I don't understand what numbers to plug into a and b