Armenian Knowledge Base  

Go Back   Armenian Knowledge Base > Thematic forums > Science and Education
Register

Reply
 
LinkBack Thread Tools
Old 11.08.2007, 22:40   #106
Вредительниц
 
BagirkaN's Avatar
 
Join Date: 03 2006
Location: San Diego, USA
Age: 46
Posts: 4,793
Downloads: 2
Uploads: 0
Blog Entries: 1
Reputation: 550 | 4
Default

Нет, правильный ответ 2 в последнем.... то есть, не точка х = -1 Там такой и нет), а "х-value" - =2, - вот чего я не понимаю...

А трайномиял - это состоящий из трех мономиалов.
Там правильный ответ (X^2+5X+25)....
СПАСИБО!
В первой - найти домен фукнкции икса...
Reply With Quote
Old 11.08.2007, 23:08   #107
Смотри мне прямо в глаза!
 
Monopole's Avatar
 
Join Date: 09 2003
Location: Все там будем.....
Age: 41
Posts: 16,499
Downloads: 1
Uploads: 0
Reputation: 493 | 6
Default

Quote:
Originally Posted by BagirkaN View Post
Нет, правильный ответ 2 в последнем.... то есть, не точка х = -1 Там такой и нет), а "х-value" - =2, - вот чего я не понимаю...
A funkciya kakaya ? Ta zhe, chto i v pervom primere ?
Quote:
А трайномиял - это состоящий из трех мономиалов.
Там правильный ответ (X^2+5X+25)....
СПАСИБО!
В первой - найти домен фукнкции икса...
Nu v pervom ya pravilno napisal, vse krome x=0, vtoroj tepr tozhe yasen, trinomial - eto trinom, ya prosto sperva podumal, chto eto prilagatelnoe. A s trejim chto-to ne yasno......

A...tak tam grafik, a ne funkciya iz pervogo primera !! Togda delaesh vot chto, nahodish na osi y tochku "1" provodish in nee liniyu, parallelnuyu osi x, nagodish tochku, v kotoroj eta liniya persekaet grafik, opuskaesh ottuda perpendikulyarna os x, eto i budet zanchenie x.
__________________
Богохульник, чревоугодник, прелюбодей, к вашим услугам.
Reply With Quote
Old 12.08.2007, 00:23   #108
Вредительниц
 
BagirkaN's Avatar
 
Join Date: 03 2006
Location: San Diego, USA
Age: 46
Posts: 4,793
Downloads: 2
Uploads: 0
Blog Entries: 1
Reputation: 550 | 4
Default

Класссссссссссссс!!
Reply With Quote
Old 12.08.2007, 01:20   #109
Дошкольник
 
Join Date: 07 2006
Location: Armenia
Posts: 125
Downloads: 0
Uploads: 0
Reputation: 4 | 0
Default

#2
As Monopole factored it out: x^3-125=x^3-5^3=(x-5)(x^2+5x+25).
The trinomal factor is the factor that is a trinomial - meaning has three terms i.e. it's x^2+5x+25

#3
As I see this problem is different from the first one (f(x)= 8/x+9), right ?

As I undesrtand you are given a line that goes through the points (1,0) and (0,-1), i.e. it intersects the x-axis at at 1 and y-axis at -1. If this is the problem you are given, then:

1. You need to find the equation of the line going through the points (1,0) and (0,-1). One way (not the only way) is to find the slope
m= (y_2-y_1)/(x_2-x_1),
where your points (1,0) = (x_2,y_2) and (0,-1) = (x_1,y_1).

So m=(0-(-1))/(1-0) = 1
and thus the equation of your line is y=mx+b ,
where m is the slope defined above and y is the y-intercepts, i.e. the point where the line crosses the y-axes,
so you have
f(x)=1*x-1 = x-1
then you need to find x such that f(x)=1, so plug the enumbers in to get f(x)=x-1=1 which gives you x=2

#1
Do you mean here f(x)= 8/x+9 or f(x)= 8/(x+9)?
In first case, as Monopole mentioned above you domain is all the real numbers except 0.
In the second case you want to exclude numbers when x+9=0, so x=-9, so your answer will be all real numbers but -9
Reply With Quote
Old 12.08.2007, 01:26   #110
Вредительниц
 
BagirkaN's Avatar
 
Join Date: 03 2006
Location: San Diego, USA
Age: 46
Posts: 4,793
Downloads: 2
Uploads: 0
Blog Entries: 1
Reputation: 550 | 4
Default

ttt jan, in my first post today here I gave 3 (three) different problems, but, as I see, Monopole was little bit messed up in them...
Reply With Quote
Old 12.08.2007, 01:28   #111
Дошкольник
 
Join Date: 07 2006
Location: Armenia
Posts: 125
Downloads: 0
Uploads: 0
Reputation: 4 | 0
Default

Quote:
Originally Posted by BagirkaN View Post
ttt jan, in my first post today here I gave 3 (three) different problems, but, as I see, Monopole was little bit messed up in them...
Are you OK now?
Reply With Quote
Old 12.08.2007, 01:29   #112
Вредительниц
 
BagirkaN's Avatar
 
Join Date: 03 2006
Location: San Diego, USA
Age: 46
Posts: 4,793
Downloads: 2
Uploads: 0
Blog Entries: 1
Reputation: 550 | 4
Default

Quote:
Originally Posted by ttt View Post

#1
Do you mean here f(x)= 8/x+9 or f(x)= 8/(x+9)?
In first case, as Monopole mentioned above you domain is all the real numbers except 0.
In the second case you want to exclude numbers when x+9=0, so x=-9, so your answer will be all real numbers but -9
I mean 8 divided by x+9
Reply With Quote
Old 12.08.2007, 01:30   #113
Дошкольник
 
Join Date: 07 2006
Location: Armenia
Posts: 125
Downloads: 0
Uploads: 0
Reputation: 4 | 0
Default

Quote:
Originally Posted by BagirkaN View Post
I mean 8 divided by x+9
Then see my answer above.
Reply With Quote
Old 12.08.2007, 01:30   #114
Вредительниц
 
BagirkaN's Avatar
 
Join Date: 03 2006
Location: San Diego, USA
Age: 46
Posts: 4,793
Downloads: 2
Uploads: 0
Blog Entries: 1
Reputation: 550 | 4
Default

Quote:
Originally Posted by ttt View Post
Are you OK now?
With # 3 - totally great! Thank you!

(and trying to get the rest part!)
Reply With Quote
Old 12.08.2007, 01:31   #115
Дошкольник
 
Join Date: 07 2006
Location: Armenia
Posts: 125
Downloads: 0
Uploads: 0
Reputation: 4 | 0
Default

Quote:
Originally Posted by BagirkaN View Post
With # 3 - totally great! Thank you!
What about others? I explained them as well.
Reply With Quote
Old 12.08.2007, 02:09   #116
Вредительниц
 
BagirkaN's Avatar
 
Join Date: 03 2006
Location: San Diego, USA
Age: 46
Posts: 4,793
Downloads: 2
Uploads: 0
Blog Entries: 1
Reputation: 550 | 4
Default

Getting in, thanks...

Also, I would appreciate your explanation on simplifying expressions like 5x-15/x (as a fraction) multiplied by x^3/x-3

Please...
Reply With Quote
Old 12.08.2007, 02:14   #117
Вредительниц
 
BagirkaN's Avatar
 
Join Date: 03 2006
Location: San Diego, USA
Age: 46
Posts: 4,793
Downloads: 2
Uploads: 0
Blog Entries: 1
Reputation: 550 | 4
Default

Or on this one: m^2 - 7m/m-2 (fraction) + another fraction 10/m-2

Thank you!
Reply With Quote
Old 12.08.2007, 02:25   #118
Дошкольник
 
Join Date: 07 2006
Location: Armenia
Posts: 125
Downloads: 0
Uploads: 0
Reputation: 4 | 0
Default

Quote:
Originally Posted by BagirkaN View Post
Getting in, thanks...

Also, I would appreciate your explanation on simplifying expressions like 5x-15/x (as a fraction) multiplied by x^3/x-3

Please...
I assume you mean
(5x-15)/x * x^3/(x-3) = 5(x-3)/x * x^3/(x-3) =
= ( 5(x-3)* x^3 ) / ( x*(x-3) )
= 5 * x^2
Reply With Quote
Old 12.08.2007, 02:28   #119
Дошкольник
 
Join Date: 07 2006
Location: Armenia
Posts: 125
Downloads: 0
Uploads: 0
Reputation: 4 | 0
Default

Quote:
Originally Posted by BagirkaN View Post
Or on this one: m^2 - 7m/m-2 (fraction) + another fraction 10/m-2

Thank you!
Please use parentheses.
I assume you mean ( m^2 - 7m ) / ( m-2 ) + 10/(m-2) =
= ( m^2 - 7m + 10) / ( m-2 ) = (m-2)*(m-5) / (m-2) = m-5
Reply With Quote
Old 12.08.2007, 02:50   #120
Вредительниц
 
BagirkaN's Avatar
 
Join Date: 03 2006
Location: San Diego, USA
Age: 46
Posts: 4,793
Downloads: 2
Uploads: 0
Blog Entries: 1
Reputation: 550 | 4
Default

Oh, I'm really impressed by your ability to solve these problems (), but would you please use words to explain what the heck I have to do to solve them!
Reply With Quote
Sponsored Links
Reply

Thread Tools


На правах рекламы:
реклама

All times are GMT. The time now is 19:30.


Powered by vBulletin® Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.