Epicmafia

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Math geeks, unite!

dezeriae

almost 10 years

Okay, so I'm failing hard, and people on my Skype are also failing hard, so someone smart please help me.

Thing what needs to be solved:

x=2^(4-x/100)

The whole thing "to the power of" after the 2.

I know the solution (yay for the internet), but I want a solution using only algebra, so no functions, no differentiation or else.

Thanks if anybody can help me with this!

dezeriae

almost 10 years

Josh/Eris solved the problem, thank you again:)

deletedalmost 10 years

We have so much in common!!! We should be besties

b0oty

almost 10 years

i wish u were taller too

deletedalmost 10 years

I wish I was a little bit taller

Clair

almost 10 years

i wish i was still a math nerd

Clair

almost 10 years

Shivv says

dezeriae says

You can use logs, the point is, don't use more advanced math than high school, and do it under maximum 15 minutes.

This is part of a 1 hour math test for high schoolers, and I fail to understand how they expect them to solve it on their level, under limited amount of time. O.o

They can just trial and error it. It isn't hard.

lol

deletedalmost 10 years

dezeriae says

You can use logs, the point is, don't use more advanced math than high school, and do it under maximum 15 minutes.

This is part of a 1 hour math test for high schoolers, and I fail to understand how they expect them to solve it on their level, under limited amount of time. O.o

They can just trial and error it. It isn't hard.

rvpp

almost 10 years

using logs is taught in high schools though..

deletedalmost 10 years

There is no closed-form solution for x*logx =n, which is what this problem breaks down to. PETA is right. Algebra won't cut it

Edark

almost 10 years

or I can keep not being a huge nerd lul

Edark

almost 10 years

like smth along the lines to get the 2^x in the left line and remove the 2^ for both n ***, man I need to freshen up on my math knowledge

Edark

almost 10 years

I think this is a pretty easy question, I just forgot how to math

dezeriae

almost 10 years

You can use logs, the point is, don't use more advanced math than high school, and do it under maximum 15 minutes.

This is part of a 1 hour math test for high schoolers, and I fail to understand how they expect them to solve it on their level, under limited amount of time. O.o

rat

almost 10 years

Peta says

AdrenalineMime says

impossible 2 solve using algebra alone

Why is the correct answer being downvoted.

How did you come up with this equation? If you try to solve it algebraically, you'll end up with x both in a base and an exponent. Have fun solving that.

Jaleb

almost 10 years

dezeriae says

I don't understand the confusion, but again:

Also, this is not homework:)

Ew... This is why I don't look to apply this subject.

deletedalmost 10 years

wait, I messed up transcribing it, the 1/100 is actually a 2^(1/100) or just ~1.0007

deletedalmost 10 years

This is as close as I can get without logs

X(1/100)^x = 16

b0oty

almost 10 years

gggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggg

deletedalmost 10 years

you ruined everything dezeriae i hope you fail your class

deletedalmost 10 years

oh *** you can't delete posts in this thread. i made a mistake.

b0oty

almost 10 years

I'm really good at math