I need some math help

[ShaRpY HaRdY]

I attached the picture of the math problem, it has to do with logarithms and such and I'm drawing a blank at the moment, I got like an hour before class and was seeing if anyone could offer some help.

 

[CM Punk]

Shit, I knew how to do this stuff. I'll get back at you but probably not. Maybe @Delik

 

[ShaRpY HaRdY]

That's where I'm at as well, I've been at this for like 2 hours (the assignment not just the problem) this is just the last one and I want to get 100% cuz it's a take home exam haha. I have this same thread up on a few other sites trying to get an answer, can't believe the brain fart im having.. My last math class before getting my 2 yr university degree.

 

[CM Punk]

Yeah, dude. I totally forgot this stuff.
I'm thinking of two different subjects while trying to do this. Like, I'm bringing the e4X from the right side to the left and start doing division in the bottom and my other my guess was e12x then you bring over e4x. Confusing stuff and I should probably start learning this stuff again. Yeah, I'm lost right now. Sorry dude.

You should run around campus and start asking people for help. lol

 

[ShaRpY HaRdY]

...e12x then you bring over e4x...

Lol I started like this and tis where I got the brain fart, I'm bout to just ask someone before class pfft, hopefully someone got it right.

 

[Jonathan]

e3x - e4x = e4x - 15

e-x = e4x - 15

-3 = -3 * 4 - 15

x = -3

 

[ShaRpY HaRdY]

e3x - e4x = e4x - 15

e-x = e4x - 15

-3 = -3 * 4 - 15

x = -3

Thanks for this, it's the best response I've received and it makes sense to me in a my mind is too burnt out and I can see this being a good answer, at least one that will get me partial credit if wrong for some chance.

 

[CM Punk]

e3x - e4x = e4x - 15

e-x = e4x - 15

-3 = -3 * 4 - 15

x = -3

I'm guessing * = multiply

So
-3 = -3 x 4 - 15
-3 = -12 - 15
-3 = -27

Kind of confusing, can you clear this up?

 

[Jonathan]

I'm guessing * = multiply

So
-3 = -3 x 4 - 15
-3 = -12 - 15
-3 = -27

Kind of confusing, can you clear this up?

I have no idea, you're right though that does give -27. These always confused me :dawg:

 

[Nero_x3]

I have no idea, you're right though that does give -27. These always confused me :dawg:

Wait, if these are supposed to involve logarithms, isn't your math completely incorrect.

 

[Jonathan]

Wait, if these are supposed to involve logarithms, isn't your math completely incorrect.

Probably. I'm ill, tired and bored. :dawg:

 

[Nero_x3]

Probably. I'm ill, tired and bored. :dawg:

Yep, you're going crazy Jono, get to bed.

 

[Trip in the Head]

Those look like powers of to me. As in e^(3x) * (e^4)^x if memory serves right you would add the powers of together when multiplying (?) so it would be e^7x I think

EDIT: But then the e's cancel since you are dealing with powers of and you essentially come out with 7x = 4x-15. And thats tit from there. But I don't feel like thats right.

 

[Nero_x3]

Those look like powers of to me. As in e^(3x) * (e^4)^x if memory serves right you would add the powers of together when multiplying (?) so it would be e^7x I think

EDIT: But then the e's cancel since you are dealing with powers of and you essentially come out with 7x = 4x-15. And thats tit from there. But I don't feel like thats right.

It's logarithms.

 

[Jonathan]

(e^3x) - (e^4)x = e^4x - 15

e^7x = e^4x - 15

e^3x = -15

x = -5


I think this should be right now.