# C2 - Logs

Watch
Announcements
#1
Hey, just a quick question.

The book I'm using to revise logs states that we need to know how to convert logs to base 10. I was just wondering if this is actually the case as nowadays, calculators have the option to work out logs without it being in base 10.
0
3 years ago
#2
I highly doubt it. (best check ur exam boards spec tho)
0
3 years ago
#3
(Original post by Nightly)
Hey, just a quick question.

The book I'm using to revise logs states that we need to know how to convert logs to base 10. I was just wondering if this is actually the case as nowadays, calculators have the option to work out logs without it being in base 10.
In the case of Edexcel, the formula for converting a log from one base to another is in the C2 section of the formula booklet.
0
3 years ago
#4
I dont understand?

Is this when you have log(little3)big6

which is log6 divided by log 3??
0
3 years ago
#5
No longer needed calculators work without the base 10 nowadays
0
3 years ago
#6
Possibly if it's a question using symbols instead of numbers.
0
3 years ago
#7
Could be needed in a proof, but if its in the formula booklet then there's little point revising it when you could be focusing on the more difficult topics. On the other hand, working out why it works / is true would be a good way to get a better understanding of logs
0
3 years ago
#8
(Original post by wantodothebest)
I dont understand?

Is this when you have log(little3)big6

which is log6 divided by log 3??

Let Log6(3) = Q
so 6 = 3^Q removing the Log by raising everything to the base power of the log, in this case your little 3
so Log(6) = Log(3^Q) take Logs of both sides in base 10 (or any base you choose)
so Log(6) = Q* LOG(3) rules of logs to take the power out
so Q = Log(6) / Log(3) rearranging to get Q = again

given Q is the same then
Log6(3) = Log(6) / Log(3)
0
X

new posts
Back
to top
Latest
My Feed

### Oops, nobody has postedin the last few hours.

Why not re-start the conversation?

see more

### See more of what you like onThe Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

### Poll

Join the discussion

#### Should there be a new university admissions system that ditches predicted grades?

No, I think predicted grades should still be used to make offers (587)
34.17%
Yes, I like the idea of applying to uni after I received my grades (PQA) (709)
41.27%
Yes, I like the idea of receiving offers only after I receive my grades (PQO) (344)
20.02%
I think there is a better option than the ones suggested (let us know in the thread!) (78)
4.54%