admin

16 Questions
1410 Answers

+4

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Neue Datenschutzrichtlinie, Mai 2018

Hallo,

Diese Webseite wurde aktualisiert mit kleineren Anpassungen an die DS-GVO.
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admin 27.05.2018

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New Privacy Policy, May 2018

Hello,

this website was updated today because of some legal changes here in Europe. ("GDPR").
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admin 27.05.2018

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New version is online for two weeks now, any problems?

Hi,

Any problems? You can use the "Report a Problem" link in the footer, or send me an email to britnex+bugs@gmail.com
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admin 12.09.2015

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New website is online.

Hi,

Any problems? You can use the "Report a Problem" link in the footer, or send me an email to britnex+bugs@gmail.com , thank you!
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Melody ●●●●●●●●●●●●●●●●

admin 30.08.2015

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Neue Version der Webseite ist online

Hi,

Probleme bitte per Email an britnex+bugs@gmail.com melden, Danke!
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admin 30.08.2015

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three times ten to the power of negative 2

help what is 3x10to the power of negative 2

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admin 26.01.2012

+3146

0

[input]64^(2/6)[/input]

64^(2/6) = 64^(1/3) = sqrt3( 64 )

admin25.04.2012

+3146

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[input]1+1[/input]

admin25.04.2012

+3146

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[input]solve( 5x+3=45-k, x)[/input]
[input]solve( 5x+3=45-k, k)[/input]

admin25.04.2012

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0

[input]log(4x-1, 3)=3[/input]

Log3(4x-1)=3
do a 3^.. on both sides (x>0?)
4x-1 = 3^3
4x-1 = 27
+1 on both sides
4x = 28
x = 28/4 = 7

admin25.04.2012

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8 red cubes + 5 blue cubes + 2 yellow cubes = 15cubes total
5 blue cubes out of 15cubes total = 5/15 = 1/3 = 0.3333333333 = 33.33333333%

admin25.04.2012

+3146

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KatieeeBethhh16:
"13+20+27+ ... +272"

[input]sum ( 13+x*7, x=0..((272-13)/7) )[/input]

this is your series:
13+20+27+ ... +272
this is the series in reversed order:
272+265+258...+13

the sum of one element of the series and one element of the reversed series (at the same index) is always the same:
13+272=285
20+265=285
27+258=285
... = 285

you have (272-13)/7 +1 = 38 such terms.

then the sum of 2 times the arithmetic series is: 38 * 285 = 10830

the sum of the arithmetic series "13+20+27+ ... +272" is then: 10830/ 2 = 5415

admin25.04.2012

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[input]x^2 = - x+30[/input]

admin25.04.2012

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two equations:

x*y=2880
x+y=-180

[input]solve( x*y=2880, x+y=-180 )[/input]

admin25.04.2012

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[input](1/5) * (3/5)[/input]

admin24.04.2012

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[input](2 1/4+1 1/8 )/ (2 1/2)[/input]

admin24.04.2012