Thread: Log squared???

Not sure even is this the right maths section but can anyone explain log squared to me. by log squared i mean log^2(x) not log(x)^2. It came up in an equation in work and we can't figure it out. I'm guessing its a different entity like ln or e.

Can anyone help?

Originally Posted by dapos

Not sure even is this the right maths section but can anyone explain log squared to me. by log squared i mean log^2(x) not log(x)^2. It came up in an equation in work and we can't figure it out. I'm guessing its a different entity like ln or e.

Can anyone help?

Do you mean log based two?

no i don't mean base 2. Assuming the base is 10 and ^2 means squared. so log^2(x)

Originally Posted by dapos

no i don't mean base 2. Assuming the base is 10 and ^2 means squared. so log^2(x)

I would assume this equates to log(x)log(x)

no it doesn't equate to log(x)log(x). that is (log(x))^2 sure. i mean Log^2(x)

Originally Posted by dapos

no it doesn't equate to log(x)log(x). that is (log(x))^2 sure. i mean Log^2(x)

Then it can only mean log(2x), i.e. 10^log(2x) = 2x

Originally Posted by colby2152

Then it can only mean log(2x), i.e. 10^log(2x) = 2x

Or perhaps ?

-Dan

find attached a section of the formula with the log^2 as described.

Originally Posted by dapos

find attached a section of the formula with the log^2 as described.

I think i had a question like this once too(I might be wrong).

Treat and log ??

Originally Posted by dapos

find attached a section of the formula with the log^2 as described.

Without any other information I would see this as log(x) log(x). What's the rest of the formula and what are you expected to do with it? Perhaps that would help.

-Dan

Originally Posted by topsquark

Without any other information I would see this as log(x) log(x). What's the rest of the formula and what are you expected to do with it? Perhaps that would help.

-Dan

This is the same thing I could assume. Like Dan said, we need more information on the nature of the problem. You said it was for work? What are you analyzing and how are you doing this?

Originally Posted by dapos

find attached a section of the formula with the log^2 as described.

I agree with topsquark. from you pic it seems to me that they want you to manipulate the expression like a quadratic equation, in which case we would use

Originally Posted by dapos

Not sure even is this the right maths section but can anyone explain log squared to me. by log squared i mean log^2(x) not log(x)^2. It came up in an equation in work and we can't figure it out. I'm guessing its a different entity like ln or e.

Can anyone help?

This weblink may be helpful. You seem to be looking at the same equation I was looking at. In short: log^2(f) = (log(f))^2.

http://www.mwe.tu-darmstadt.de/filea...N%20MODELS.pdf

Log^2(x), I'm pretty sure that this is log(log(x)), If it isn't then i want to know what log iterated is if anyone knows...
For example: log^2(10) = 0 ( log(10) = 1, log(1) = 0)
so log^2(10^10) = 1

couldn't this be like the sin and cos functions?

when we use sin^2(x) we mean sin(x)*sin(x)