admin

16 Questions
1410 Answers

+4

2323

1

+3146

Neue Datenschutzrichtlinie, Mai 2018

Hallo,

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

Off-Topic

admin 27.05.2018

+19

3502

2

+3146

New Privacy Policy, May 2018

Hello,

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

Off-Topic

admin 27.05.2018

+6

2284

1

+3146

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
mehr ..

admin 12.09.2015

+20

2725

16

+3146

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!
mehr ..

Melody ●●●●●●●●●●●●●●●●

admin 30.08.2015

+7

2590

2

+3146

Neue Version der Webseite ist online

Hi,

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

admin 30.08.2015

+67

4

4479

11

+3146

three times ten to the power of negative 2

help what is 3x10to the power of negative 2

●●●●●●●●●●●

admin 26.01.2012

+3146

0

[input]solve( B = 1/xn - 1/xf, xf)[/input]

B = 1/xn - 1/xf
-1/xn
B-1/xn = 1/xn-1/xn - 1/xf
B-1/xn = - 1/xf
xn*B/xn-1/xn = - 1/xf
(xn*B-1)/xn = - 1/xf
*-1
-(xn*B-1)/xn = 1/xf
inv.
-xn/(xn*B-1) = xf
xf = -xn/(xn*B-1)

admin24.11.2012

+3146

0

x^11/1500=1005
x^11/1500*1500=1005*1500
x^11=1005*1500
x^11=1507500
x=sqrt(1507500, 11)
x=3.64468296092489

[input]x^11/1500=1005[/input]

admin22.11.2012

+3146

0

[input]150*110%[/input]

admin22.11.2012

+3146

0

[input](-289) / (-17)[/input]

admin21.11.2012

+3146

0

3e^(5x)=8943
| /3
3e^(5x)=8943
e^(5x)=8943/3
e^(5x)=2981
5x = ln( 2981 )
x = ln( 2981 )/5

[input]3e^(5x)=8943[/input]

admin21.11.2012

+3146

0

(x+6) (x-6) = (x-2)²
x^2+6x-6x-36 = x^2-4x+4
x^2-36 = x^2-4x+4
| -x^2
-36 = -4x+4
|-4
-40 = -4x
| / -4
10 = x

admin20.11.2012

+3146

0

[input](x+6)*(x-6) = (x-2)²[/input]

admin20.11.2012

+3146

0

sin(x+ pi/6) + sin(x- pi/6 )= sqr(3/2)

lemma:
sin(a)+sin(b) = 2*sin( (a+b)/2 ) * cos( (a-b)/2 )

sin(x+ pi/6) + sin(x- pi/6 )= sqr(3/2)
2*sin( (x+ pi/6 +x- pi/6 )/2 ) * cos( (x+ pi/6 -(x- pi/6) )/2 ) =sqr(3/2)
2*sin( x ) * cos( pi/6 ) = sqr(3/2)
2*sin( x ) * sqrt(3)/2 = sqr(3/2)
2*sin( x ) = (sqr(3/2)) / (sqrt(3)/2)
2*sin( x ) = sqrt(2)
sin(x) = sqrt(2)/2

EdDad28:
Solve the equation on the interval [0,2pi)

x = acos( sqrt(2)/2 ) = pi/4

admin20.11.2012

+3146

0

(x-5)^2 = (x+7)^2
x^2-10x+25 = x^2+14x+49
| -x^2
-10x+25 = 14x+49
| -14x
-24x+25 = 49
| -25
-24x = 24
| /-24
x = -1

[input](x-5)^2 = (x+7)^2[/input]

admin20.11.2012

+3146

0

[inputrad]sin( x ) = 0.8599[/inputrad]

check:
[inputrad]sin( 1.035073739378042 )[/inputrad]

admin20.11.2012