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Jostyrostelli

Jostyrostelli

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Joined
May 29, 2004
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8,061
Can't solve a mathematical equation?, can't remember a particular thing?

Ask here and see if someone else knows!

I'll start with my mathematical equation.

a Log (x-5) = a? Log (7-x)

And the "a"'s are not random numbers like 5 times log...but it's the (don't know correct word in english). It's the a like in x?...it's the "macht" (power, wrong free translation)

The general rule is ^g Loga^b = b^g log a
The b is no normal number in my equation! It's the higher (x? one, it's the 2)

^aLog(x-5) = ^a? Log (7-x)

I have this rule: ^g Log (a^b) = b x ^g Log (a)

MXM, Chaos and Raspberri said this rule could be applied here but I still don't think that's possible.

Correct me if I'm wrong.. :)
 
I don't really follow you here...

What's a again?

^g Loga^b = b^g log a: what do ^-marks before g mean? is ^g a base of logarithm?

Maybe you should draw the equation in paint or something with all the proper symbols? :)
 
I got the answer from a classmate, he called a teacher.

It's a rule I have never heard of.



That's the equation.

Solve like this:

 
Oh, I see. So a^2 is the base of logarithm. Although I've never seen it written that way. Usually the base is written with small digits after the LOG.
It is the same rule. You skipped a few steps on your drawing, that's why it looks weird.
 
Yah skipped a few otherwise my page would be too small hehe.

This was the first time I saw this, and I can expect it on my test tomorrow.. :bangin:

Book doesn't say ANYTHING about it...

Is ABC-formula a normal English word? Cause we even have different words for it.

It's the:

abc-fornule.gif
 
Book doesn't say about it??
You need only two rules for this problem:
(x^a)^b = x^(a*b)
and
a*log(x)=log(x^a)
I'm pretty sure they are in any book :)

That thing is called quadratic formula if I remember correctly.
 
^I'll check it out in the morning, I solved it now, gonna practise that one when I get up. Thanks.

^^Yeah I Know, I can make little cartoons too, moving cartoons! I used to make bunnys who were "busy" with eachother and we laughed our asses off everytime we checked it out in class :D
 
*joins the pile*

*feels glad he dropped A-Level maths*


Currently Listening To: Bliss - Muse - Origin Of Symmetry (2001)
 
bunch of nerds!

I'm so glad I won't do that again! only math class remaining is statistics next session, and apparently it's very easy! 8)
 
i still got a long way to go with math...
currently taking: differential equation, theoretical statistics
and i stil have to take discrete math and 2nd part of the statistics course. probably some more that i don't even know about... :yucky:
 
SuperGeijiMayuu said:
i still got a long way to go with math...
currently taking: differential equation, theoretical statistics
and i stil have to take discrete math and 2nd part of the statistics course. probably some more that i don't even know about... :yucky:
Click to expand...

heh discrete can be a pain especially if you get it with Brown or Shockley. DiffEq is really dependent upon the teacher. luckily Im through most of my math (only have combinatorics left and thats this semester)
 
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