/sci/ - Science & Math » Thread #7617174

[14 / 3 / ?]

114KiB, 810x1080, videl.jpg

Anonymous Mon 26 Oct 2015 15:11:00 No.7617174 View Reply Report Delete

Quoted By: >>7617203 >>7617218 >>7618534 >>7618543

im rusty in math /sci/, how do I find the inverse
f(x) = (3x^2 - x)/2
isolating x doesn't work 'cause two x's, what do???

Anonymous

Anonymous Mon 26 Oct 2015 15:16:30 No.7617203 Report Delete

Quoted By: >>7617215

>>7617174
multiply by f'(x), and set it equal to one, then solve for f'(x)

Anonymous

Anonymous Mon 26 Oct 2015 15:19:59 No.7617215 Report Delete

Quoted By: >>7617225

>>7617203
so 1 = f'(x)(3x^2-x)/2 and isolate f'(x)????
why equal to 1 though

Anonymous

Anonymous Mon 26 Oct 2015 15:21:14 No.7617218 Report Delete

Quoted By: >>7617226

>>7617174
This board is 18+ and not for your babby high school homework. Leave.

Anonymous

Anonymous Mon 26 Oct 2015 15:23:01 No.7617225 Report Delete

Quoted By:

>>7617215
because that is the definition of inverse, f(x) * f'(x) = 1

Anonymous

Anonymous Mon 26 Oct 2015 15:23:18 No.7617226 Report Delete

Quoted By: >>7617270 >>7617288

>>7617218
neets don't have homework, retart
i"m doing this for a program I'm wrting in haskell, and its been a 2 years since I've done math fag

Anonymous

Anonymous Mon 26 Oct 2015 15:25:27 No.7617235 Report Delete

Quoted By:

swap x and y and then learn to algebra

Anonymous

Anonymous Mon 26 Oct 2015 15:33:44 No.7617270 Report Delete

Quoted By: >>7617298

>>7617226
No one cares about your shitty made up excuses. This is elementary math homework posted by people who are underage. Get the fuck out.

Anonymous

Anonymous Mon 26 Oct 2015 15:39:23 No.7617288 Report Delete

Quoted By: >>7617298

>>7617226
Tell me more about this haskell problem and I'll post you the solution.

Anonymous

Anonymous Mon 26 Oct 2015 15:44:02 No.7617298 Report Delete

Quoted By: >>7617406

>>7617270
not everyone retains 100% of math knowledge, snowflake, specially if they don't exercise their brain on such areas
that said, I can still remember that f . f'(x) == x, but I can' remember how to inverse a quadratic which has x appearing twice
>>7617288
its problem 44 on projecteuler, but I know how to go about solving, I just need this key function for it to work.

Anonymous

Anonymous Mon 26 Oct 2015 16:22:38 No.7617406 Report Delete

Quoted By:

>>7617298
Look for completing the square.

Anonymous

Anonymous Mon 26 Oct 2015 17:50:07 No.7617652 Report Delete

Quoted By:

Surely you just complete the square?

Anonymous

View Same Google ImgOps iqdb SauceNAO 1425883253845.jpg, 28KiB, 304x408

Anonymous Tue 27 Oct 2015 02:00:23 No.7618534 Report Delete

Quoted By:

>>7617174
Gonna need more Videl OP

Anonymous

View Same Google ImgOps iqdb SauceNAO 119852145023.jpg, 145KiB, 674x684

Anonymous Tue 27 Oct 2015 02:06:22 No.7618543 Report Delete

Quoted By:

>>7617174
2x=3y^2-y
2x=3(y-1/6)^2-1/36
√[(2x+1/36)/3]=y-1/6
y=1/6+√[(2x+1/36)/3]

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