logs - c2
Maths and statistics discussion, revision, exam and homework help.
-
- Reputation:
- TSR Demigod
- Posts: 5,512
Re: logs - c2(Original post by otrivine)
hi can someone tell me please the formula if you need to make the same log bases such as logbase3(2-3x)=logbase9(6x2-19x+2)
how would i make the same bases 3 what is formula thanks
Example 1:
If we want to make it to the base 5.
Example 2:
We want to convert it to the base 7.
-
- Reputation:
- Thread Starter
- TSR Legend
- Posts: 14,592
Re: logs - c2one question p=logbaseq16 how can you make the base q subject?(Original post by raheem94)
Example 1:
If we want to make it to the base 5.
Example 2:
We want to convert it to the base 7.
-
- Reputation:
- TSR Demigod
- Posts: 5,512
Re: logs - c2(Original post by otrivine)
do we need to know that for c2 cause i am solving this one where it says
p=logbaseq16 find in terms of P
a)logbaseq2
Remember,
Example:
You are asked to find
in terms of 
.
So here is how we will do it,
.
We know
equals 
so we can write 
as 
-
- Reputation:
- TSR Demigod
- Posts: 5,512
Re: logs - c2(Original post by otrivine)
one question p=logbaseq16 how can you make the base q subject?
To make it the subject, use the rule,
can be written as 
Compare, with .
Here,
So now write it in the way
, sub in the above data, we will get, 
Now to remove the power of from 
, follow the following step:
Last edited by raheem94; 07-05-2012 at 20:21. -
- Reputation:
- TSR Royalty
Re: logs - c2It is the core definition of logs(Original post by otrivine)
do we need to know that for c2
(Original post by otrivine)
cause i am solving this one where it says
p=logbaseq16 find in terms of P
a)logbaseq2
A Raheem said this does not require anything beyond knowing that 2^4 = 16 -
- Reputation:
- Thread Starter
- TSR Legend
- Posts: 14,592
Re: logs - c2thanks and last question ten of them this question(Original post by TenOfThem)
It is the core definition of logs
A Raheem said this does not require anything beyond knowing that 2^4 = 16
http://www.edexcel.com/migrationdocu...e_20110526.pdf
8)a) to do that how ? i got 2xpower3 for volume then what i do? -
- Reputation:
- TSR Demigod
- Posts: 5,512
Re: logs - c2Let 'm' be the other side of the cuboid.(Original post by otrivine)
thanks and last question ten of them this question
http://www.edexcel.com/migrationdocu...e_20110526.pdf
8)a) to do that how ? i got 2xpower3 for volume then what i do?
Remember,
We know volume equals 81, find an equation for 'm'.
L = 4(2x) + 4x +4m -
- Reputation:
- Thread Starter
- TSR Legend
- Posts: 14,592
Re: logs - c2yep got the answer thanks and why did u put m and not x(Original post by raheem94)
Let 'm' be the other side of the cuboid.
Remember,
We know volume equals 81, find an equation for 'm'.
L = 4(2x) + 4x +4m
ANd for C2 what volume and lengths and area do we need to know to be able to apply like these questions? -
- Reputation:
- TSR Demigod
- Posts: 5,512
Re: logs - c2How do you know the other length will be 'x'?(Original post by otrivine)
yep got the answer thanks and why did u put m and not x
ANd for C2 what volume and lengths and area do we need to know to be able to apply like these questions?
Another length is specified as 'x' so i should now choose a different variable.
Just learn the formulas given in the book, to be honest, this part a of the question was o-level stuff. -
- Reputation:
- Thread Starter
- TSR Legend
- Posts: 14,592
Re: logs - c2thanks you are the best(Original post by raheem94)
How do you know the other length will be 'x'?
Another length is specified as 'x' so i should now choose a different variable.
Just learn the formulas given in the book, to be honest, this part a of the question was o-level stuff.
but i did not get the question on logs where we said let p=logbaseq16 find in terms of p logbaseq2? -
- Reputation:
- TSR Demigod
- Posts: 5,512
Re: logs - c2I don't have any idea of explaining you without doing a solution, so i will have to go for it.(Original post by otrivine)
thanks you are the best
but i did not get the question on logs where we said let p=logbaseq16 find in terms of p logbaseq2?
So
You look to be posting a lot, so i think you should consider learning LaTex.Last edited by raheem94; 07-05-2012 at 20:53. -
- Reputation:
- Thread Starter
- TSR Legend
- Posts: 14,592
Re: logs - c2thanks ok http://www.edexcel.com/migrationdocu...e_20090605.pdf(Original post by raheem94)
I don't have any idea of explaining you without doing a solution, so i will have to go for it.
So
You look to be posting a lot, so i think you should consider learning LaTex.
question 9)a) i did h=300/2r
and sub into the the area but is not working? -
- Reputation:
- TSR Demigod
- Posts: 5,512
Re: logs - c2You need to work hard on your basics mate.(Original post by otrivine)
thanks ok http://www.edexcel.com/migrationdocu...e_20090605.pdf
question 9)a) i did h=300/2r
and sub into the the area but is not working?
We know V= 300, find 'h' in terms of r^2.
Then find the surface area, i am assuming you are clear with the meaning of surface area. -
- Reputation:
- Thread Starter
- TSR Legend
- Posts: 14,592
Re: logs - c2how can i improve my basics for C2 please tell me raheem(Original post by raheem94)
You need to work hard on your basics mate.
We know V= 300, find 'h' in terms of r^2.
Then find the surface area, i am assuming you are clear with the meaning of surface area.
what does A and H stand for in volumeLast edited by otrivine; 07-05-2012 at 21:21. -
- Reputation:
- TSR Demigod
- Posts: 5,512
Re: logs - c2There is no magic wand to improve yourself.(Original post by otrivine)
how can i improve my basics for C2 please tell me raheem
what does A and H stand for in volume
I just used to read all the examples and solve all the questions from the book.
A stands for area.
The 'H' is 'h', and it is labelled in the diagram. -
- Reputation:
- Thread Starter
- TSR Legend
- Posts: 14,592
Re: logs - c2shall i do all the mixed exercise?(Original post by raheem94)
There is no magic wand to improve yourself.
I just used to read all the examples and solve all the questions from the book.
A stands for area.
The 'H' is 'h', and it is labelled in the diagram. -
- Reputation:
- TSR Demigod
- Posts: 5,512
Re: logs - c2(Original post by otrivine)
shall i do all the mixed exercise?
![a = b^{\frac{1}{c}} = \sqrt[c]{b}](http://www.thestudentroom.co.uk/latexrender/pictures/71/715f55195fa4b3815258cbca686a885a.png "a = b^{\frac{1}{c}} = \sqrt[c]{b}")
