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#251 2013-08-08 01:29:21

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,455

Re: Simplify the following:

Hi;

Okay, take all the time you need.


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

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#252 2013-08-08 20:17:58

EbenezerSon
Member
Registered: 2013-07-04
Posts: 473

Re: Simplify the following:

bobbym wrote:


I was interrupted by some errand, boring one indeed.

Bobbym, it seems you mistakenly made a negative sign a positive sign.
The original is the same as the one Anomnystify solved please check the sign at #244. I mean;
3(x-1)/x-9,

Which you made it
3(x+1)/x^2-9.


touched

Last edited by EbenezerSon (2013-08-08 20:32:27)


I know only one thing - that is that I know nothing

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#253 2013-08-08 23:55:51

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,455

Re: Simplify the following:

Hi;

I wrote, that there is a mistake in line 2 of post #244

EbenezerSon wrote:
anonimnystefy wrote:

Hi EbenezerSon

With a careful look at signs I think should be,
x-3x-3-3/x^2-9 =

-2x-6/x^2-3^2 =

-2(x+3)/(x-3)(x+3)
= -2/x-3

Please am I right there.

Thanks.


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

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#254 2013-08-10 04:13:56

EbenezerSon
Member
Registered: 2013-07-04
Posts: 473

Re: Simplify the following:

Please,  I mean the problem itself.
You made a negative sign a positive sign.

Here ;

3(x-1). Which you made it 3(x+1).


You check it from one of your post.


I know only one thing - that is that I know nothing

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#255 2013-08-10 04:23:37

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,455

Re: Simplify the following:

The first line is 3(x+1)

The second line changes that to 3x - 3, that is a mistake.


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

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#256 2013-08-10 04:54:29

EbenezerSon
Member
Registered: 2013-07-04
Posts: 473

Re: Simplify the following:

Please look at #252.
That is the original question.

The first line is -3(x-1).

And changes the second to be,
-3x+3


I know only one thing - that is that I know nothing

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#257 2013-08-10 04:58:00

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,455

Re: Simplify the following:

You are not understanding what I am saying. Post #244 is wrong at the second line.

Please post the original problem from the book.


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

#258 2013-08-10 05:12:22

EbenezerSon
Member
Registered: 2013-07-04
Posts: 473

Re: Simplify the following:

1/1+3 - 3(x-1)/x^2-9.

That is it.


I know only one thing - that is that I know nothing

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#259 2013-08-10 05:17:15

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,455

Re: Simplify the following:

And what did you get for an answer?


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

#260 2013-08-10 05:28:19

EbenezerSon
Member
Registered: 2013-07-04
Posts: 473

Re: Simplify the following:

I am not at home now, I will post the original when I get there.

Thanks.


I know only one thing - that is that I know nothing

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#261 2013-08-10 05:30:38

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,455

Re: Simplify the following:

Okay, see you then.


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

#262 2013-08-11 01:54:51

EbenezerSon
Member
Registered: 2013-07-04
Posts: 473

Re: Simplify the following:

Hi, Bobbym.

This is the one from the book;

1/x-3 - 3(x-1)/x^2-9


I had -2/x+3 as answer.


I know only one thing - that is that I know nothing

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#263 2013-08-11 02:02:16

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,455

Re: Simplify the following:

Hi;

That is correct!


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

#264 2013-08-11 04:02:37

EbenezerSon
Member
Registered: 2013-07-04
Posts: 473

Re: Simplify the following:

bobbym wrote:

Hi;

How did you get,
9^n+2 * 3^n+2  out of 27^n+2?


eekkiss


I have edited it.

Last edited by EbenezerSon (2013-08-11 04:17:33)


I know only one thing - that is that I know nothing

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#265 2013-08-11 04:10:03

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,455

Re: Simplify the following:

Hi;

I did not get that. Where does 23^n come from?


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

#266 2013-08-11 04:21:11

EbenezerSon
Member
Registered: 2013-07-04
Posts: 473

Re: Simplify the following:

Please,  I double check it I have edited.


Thanks.


I know only one thing - that is that I know nothing

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#267 2013-08-11 04:26:08

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,455

Re: Simplify the following:

27^a = 9^a * 3^a


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

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#268 2013-08-11 04:48:58

EbenezerSon
Member
Registered: 2013-07-04
Posts: 473

Re: Simplify the following:

It's 27^n+2, and not 27^a.


I know only one thing - that is that I know nothing

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#269 2013-08-11 04:49:48

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,455

Re: Simplify the following:

You can say a = (n+2), same principle.

27^(n+2) = 9^(n+2) * 3^(n+2)


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

#270 2013-08-11 05:00:55

EbenezerSon
Member
Registered: 2013-07-04
Posts: 473

Re: Simplify the following:

I suppose the base must always be the same in each case. So I percieved it to be,

27^n+2=27^n*27^2=3^3n * 3^3+2.

I had thought should be so.


I know only one thing - that is that I know nothing

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#271 2013-08-11 05:02:00

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,455

Re: Simplify the following:

I am sorry, I can not follow that. Please bracket it off.


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

#272 2013-08-11 05:10:29

EbenezerSon
Member
Registered: 2013-07-04
Posts: 473

Re: Simplify the following:

In fact I have not seen an indicial problem being split to get different numbers as the base. like what is in #269.


.Thiş problem is from indices.


I know only one thing - that is that I know nothing

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#273 2013-08-11 05:13:25

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,455

Re: Simplify the following:

You should learn to latex or to use parentheses better.

That modern notation they are using in that book is not good.


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

#274 2013-08-11 05:30:07

EbenezerSon
Member
Registered: 2013-07-04
Posts: 473

Re: Simplify the following:

27^n+2=27^n * 27^2

Thıs is how I mean, I will learn parenthesis in it proper way as you say.


For instance, 6^n+3=6^n * 6^3.


Because, for instance, 3^2 * 3^2=3^(2+2).

What do you say.


I know only one thing - that is that I know nothing

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#275 2013-08-11 05:34:05

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,455

Re: Simplify the following:

All of that is correct but I have to interpret every bit of it.

When you write 27^n+3 in mathematics that means

It is properly written  27^(n+3) this means

Notice they are both very different.


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

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