You are Here: Home >< Maths

Announcements Posted on
Four hours left to win £100 of Amazon vouchers!! Don't miss out! Take our short survey to enter 24-10-2016
is this to do with logs? how do i do it
2. (Original post by dongonaeatu)
is this to do with logs? how do i do it
log49 = ?

Just remember 23=8
and log28 = 3
3. It is indeed. Take logs of both sides

so xlog4=log9
4. (Original post by dongonaeatu)
is this to do with logs? how do i do it
Start with taking logs of both sides and then see if you can rearrange to get x=
5. yes it is

take logs of both sides

use the rule log(ab) = blog(a)
6. (Original post by TenOfThem)
yes it is

take logs of both sides

use the rule log(ab) = blog(a)
i get 1.584962501

to 3dp is it: 1.585
7. (Original post by J10)
It is indeed. Take logs of both sides

so xlog4=log9
1.585 is that the answer for x
8. (Original post by dongonaeatu)
1.585 is that the answer for x
Yep

Also without a calculator you know 4^1 = 4 and 4^2 = 16 so x is going to be between 1 and 2 so 1.585 sounds sensible. A useful check if you don't have a calculator
9. (Original post by TenOfThem)
yes it is

take logs of both sides

use the rule log(ab) = blog(a)
Superscripted
10. (Original post by TheGrinningSkull)
Superscripted
hey man is turning point the same as stationary point?
11. (Original post by dongonaeatu)
hey man is turning point the same as stationary point?
For the most part, yes
12. You should really pay more attention in class.
13. (Original post by Lilium)
You should really pay more attention in class.
LoL

I expect that to become your sig ...
14. (Original post by dongonaeatu)
hey man is turning point the same as stationary point?
Like TenOfThem said, for the most part yes, turning points are when you have minimums and maximums where the gradient changes at the stationary point, however this isn't always the case such as points of inflection.
15. (Original post by nm786)
You're a bit late to the party. Also, 3dp.
You're a bit late to the party. Also, 3dp.
yeah.
i thought it said 3sf
17. (Original post by nm786)
yeah.
i thought it said 3sf
even if it was 3 significant figures wouldn't it be 1.59 instead of 1.58
18. (Original post by nm786)
yeah.
i thought it said 3sf
Haha sneaky edit. I'm a chronic misreader so I suppose I can't really talk

Like in C2 where I ended up losing out on full UMS because of it
19. (Original post by zed963)
even if it was 3 significant figures wouldn't it be 1.59 instead of 1.58
no it would be 1.58 as there is a 4 after it and 4 is less than 5,
20. (Original post by zed963)
even if it was 3 significant figures wouldn't it be 1.59 instead of 1.58
Nope, it's 1.58496...... so 3sf = 1.58 and 3dp = 1.585.

When I saw that, I checked

Register

Thanks for posting! You just need to create an account in order to submit the post
1. this can't be left blank
2. this can't be left blank
3. this can't be left blank

6 characters or longer with both numbers and letters is safer

4. this can't be left empty
1. Oops, you need to agree to our Ts&Cs to register

Updated: April 15, 2012
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Today on TSR

Who is getting a uni offer this half term?

Find out which unis are hot off the mark here

Poll
Useful resources

Maths Forum posting guidelines

Not sure where to post? Read here first

How to use LaTex

Writing equations the easy way

Study habits of A* students

Top tips from students who have already aced their exams

Chat with other maths applicants