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/sci/ - Science & Math

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2172974 No.2172974 [Reply] [Original]

ITT: ask the human calculator anything.

>> No.2172981

What's the factorial of 1/2?

>> No.2172996

>>2172981

sqrt(pi)

durr

>> No.2172997

Compute 60000000↑↑60000000.

>> No.2172998

hurpadurpadururuhurpa?

>> No.2173001

>>2172996
I think the calculator is broken, since it's <span class="math">\displaystyle \frac{\sqrt{\pi}}{2}[/spoiler].

>> No.2173004

>>2173001
correct

>> No.2173010

<div class="math"> \frac{d^{\frac{1}{2}}x}{dx^{\frac{1}{2}}} = ?</div>

>> No.2173015
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2173015

>>2172997

>> No.2173021

>>2173010

wat

Does that actually man something?

>> No.2173029

>>2173021
yes, the half derivative of x

>> No.2173038

woah what the fucks going on in this thread

>> No.2173058 [DELETED] 

<div class="math"> \int_0^\infty e^{-x^2} </div>
or a little bit more dificult one:
<div class="math"> \int_0^5 e^{-x^2} </div>

>> No.2173067

forgot the dx:
<div class="math"> \int_0^\infty e^{-x^2} dx </div>
or a little bit more dificult one:
<div class="math"> \int_0^5 e^{-x^2} dx </div>

>> No.2173078

>>2173058
>herp derp doesn't know gamma fcn. what the erf?

>> No.2173087

>>2173067
first ones <span class="math"> \frac{\sqrt{\pi}}{2} [/spoiler] but thats from memory

>> No.2173094

92563 + 5225445
what does the answer read when held upside down?

>> No.2173119

The first one is 1/(2pi)^0.5

The derivation comes from integrating the 3d function z = e^(-x^2-y^2) by converting into polar coordinates (x^2 + y^2 = r^2, and integrating between 0 and 2pi with respect to theta, this is where the 2pi comes from.)

it's definitely 1 on root 2 pi. the issue is that you cannot directly integrate this function, and so i do not know how to do the second harder integral.

>> No.2173441

14/3 ?

>> No.2173459

>>2173067
the second one is <span class="math">\frac {2}{\sqrt \pi}erf(5)[/spoiler], where erf is the errorfunction.

captcha: 184 errores

>> No.2173480

I think I got this one. The first integral is from 1 to 2 of p^2 * sin(theta), which means its sin(theta)/3*p^3 from 1 to 2, i.e. 8 * sin(theta) / 3 - sin(theta)/3, or 7/3 * sin(theta). The second integral is 7/3*sin(theta) from pi to pi/2. Sin(pi) is 0, sin(pi/2) is 1, so the answer should be -7/3. The final integral is from 0 to 2 of -7/3, which should be -14/3 - 0, so the final answer should be -14/3.

>> No.2173511

what is it like to never know love?

>> No.2173605
File: 10 KB, 429x410, 1268490447657.png [View same] [iqdb] [saucenao] [google]
2173605

>this thread

>> No.2173719

>>2172252
Calculate this and tell me how you did it

>> No.2174600
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2174600

Implying I need longer than 30 seconds

>> No.2174789

>>2174600
This

>> No.2174802

factor 1294871028957021983740198237409875601843671085821934791283705918620859120893560891237409182374091820
65789032465897356928734658972976

>> No.2174816

what is the 123456789th largest positive integer that is a prime number

>> No.2174823

>>2174816
7

that was easy

gimmi another one

>> No.2174839

Riemann Hypothesis plz.

>> No.2174848

>>2174816
clearly does not exist as there are infinite primes.

>> No.2174855

>>2174848
what he said. perhaps you meant smallest?

>> No.2174872

7/3