Math problem for credits 2!!!

[leo172519]

So it turns out the original problem wasn't written right. I have also found out the answer, but I am still stumped at how to get it. Turns out MrRubix was incorrect in finding it, even though it seems right to me considering when i checked it the answer was right...ANNNYYWHOOO
The actual equation is as follows...

log8(3x^2 - 35.33x + 262216.88)^.5 = 3

supposedly,
One answer is 911.

again it is log base 8.
^ indicate a power function.

1000 credits to get to this answer or one that mimics it in some way.
GL

note: answers 6688.093936 and -6676.31727 are incorrect even though that is what seems to work within the equation.

[meno_rocks123]

Re: Math problem for credits 2!!!

mimics it in some way.

log8(3x^2 - 35.33x + 262216.88)^.5 = 3
log8(3x^2 - 35.33x + 262216.88)^.5-3 = 0

creds pleez

[Sh4d0wRe4p3r666]

Re: Math problem for credits 2!!!

Working on it....please wait.

--------------------------------------------------------------------------------

log8(3x^2 - 35.33x + 262216.88)^.5 = 3
.5log8(3x^2 - 35.33x + 262216.88) = 3
log8(3x^2 - 35.33x + 262216.88) = 6
8^6 = (3x^2 - 35.33x + 262216.88)
0 = 3x^2 - 35.33x + 72.88
x = (35.33 +- sqrt(35.33^2-4*3*72.88))/6
x = (35.33 +- sqrt(373.6489))/6
x = (35.33 +- 19.33)/6

x1=9.11 x2=8/3

[leo172519]

Re: Math problem for credits 2!!!

need to see it done meno sorry :/

[emerald000]

Re: Math problem for credits 2!!!

log8(3x^2 - 35.33x + 262216.88)^.5 = 3
.5log8(3x^2 - 35.33x + 262216.88) = 3
log8(3x^2 - 35.33x + 262216.88) = 6
8^6 = (3x^2 - 35.33x + 262216.88)
0 = 3x^2 - 35.33x + 72.88
x = (35.33 +- sqrt(35.33^2-4*3*72.88))/6
x = (35.33 +- sqrt(373.6489))/6
x = (35.33 +- 19.33)/6

x1=9.11 x2=8/3

That should be it.

[leo172519]

Re: Math problem for credits 2!!!

perfect thank you

[windsurfer-sp]

Re: Math problem for credits 2!!!



Which one? Makes a big difference.

If I was to solve it I would put the correct one of those equations into my Graphics calulator and the line y=3. Then hit intersect. You should be able to get all the values that way.

If you tell me which equation I can try and do the algerbraic approach when I get back from my calculus exam.

Edit: Freaking ninja'd.

Did you ever give Rubix his credits?

[leo172519]

Re: Math problem for credits 2!!!

its the bottom one windsurfer.

and...yes :'(, but it did seem right, but I should have realized the log was out of the sqrt so it was not possible to just square it out. oh well 2k credits gone.

EDIT: also i need to rephrase, MrRubix was correct minus some rule of logs that was misinterpreted. Otherwise it was 100% right.

[madmatt621]

Re: Math problem for credits 2!!!

Ugh...

So...late.

462.4463435

Why don't I just start a game involving this?

[meno_rocks123]

Re: Math problem for credits 2!!!

need to see it done meno sorry :/

that wasn't in the requirements

[Nyokou]

Re: Math problem for credits 2!!!

Math nerds.

[MrRubix]

Re: Math problem for credits 2!!!

Ah I misinterpreted how you wrote it the first time. What I did was technically correct given my assumptions with the square root. The way you write logs out make a big difference.

Again see my other solution with the explanation up top describing why the difference is important.

[GuidoHunter]

Re: Math problem for credits 2!!!

This really didn't need to be a new thread.

--Guido

http://andy.mikee385.com