Math Is Fun Forum
  Discussion about math, puzzles, games and fun.   Useful symbols: √ ∞ ≠ ≤ ≥ ≈ ⇒ ∈ Δ θ ∴ ∑ ∫ π -

Login

Username

Password

Not registered yet?

#1 2014-01-22 03:16:44

bronxsystem
Full Member

Offline

mixed fraction

Hey all

I can do most of these but cant get past this one for some reason.



=







but i get stuck here S: is this totally wrong?

with the other problems i was able to factor them then cancel out. But this one i keep getting to this point and get confused

Last edited by bronxsystem (2014-01-22 03:21:39)

#2 2014-01-22 03:22:08

bobbym
Administrator

Offline

Re: mixed fraction

Hi;

There are probably a couple of ways to get there:

1) Multiply top and bottom by a.

1) Multiply top and bottom by a2.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

#3 2014-01-22 03:30:04

bronxsystem
Full Member

Offline

Re: mixed fraction

from the last one? 1+a/a * a2/1-a2

multiply both by a?

#4 2014-01-22 03:34:17

bobbym
Administrator

Offline

Re: mixed fraction

Hi;

No, I was starting from the beginning.



Now you multiply top and bottom of that by a2.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

#5 2014-01-22 03:52:58

bob bundy
Moderator

Offline

Re: mixed fraction

hi

Is that a2 really



?

Bob


You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

#6 2014-01-22 03:58:45

Nehushtan
Power Member

Offline

Re: mixed fraction

Hint:


134 books currently added on Goodreads

#7 2014-01-22 03:59:10

bobbym
Administrator

Offline

Re: mixed fraction

Hi Bob;

Hmmm, that is probably true.

Latexify, latexify, latexify. Our lives are frittered away by ascii, latexify!


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

#8 2014-01-22 04:03:59

bob bundy
Moderator

Offline

Re: mixed fraction

Years of teaching pupils with squiggly writing.  I'm used to powers appearing in random places.  smile

Bob


You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

#9 2014-01-22 04:05:12

bob bundy
Moderator

Offline

Re: mixed fraction

By the way.  Who were you quoting with that latexify quote?

Bob


You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

#10 2014-01-22 04:08:00

bobbym
Administrator

Offline

Re: mixed fraction

I was trying to quote Henry David Thorough. Got it backwards it seems.

HDT wrote:

Our life is frittered away by detail. Simplify, simplify, simplify! I say, let your affairs be as two or three, and not a hundred or a thousand; instead of a million count half a dozen, and keep your accounts on your thumb-nail.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

#11 2014-01-22 04:09:15

bronxsystem
Full Member

Offline

Re: mixed fraction

in the book it doesnt have the exponent it just says a2 but maybe its typo? omg >< i will retry

#12 2014-01-22 04:15:41

bronxsystem
Full Member

Offline

Re: mixed fraction

http://gyazo.com/02ae3b4a9ee3cfd8f0c854b534769eba.png

im sure its a typo because the 2 is after the a which does not conform with previous exercises.

i spent 2 hours on this :*( 2 hours 20 minutes

thanks all for help and very sorry for wasting everyones time.

Last edited by bronxsystem (2014-01-22 04:20:23)

#13 2014-01-22 04:16:49

bobbym
Administrator

Offline

Re: mixed fraction

If you follow Post #4 will get you there very easily.

But you will then notice that the book problem must be a typo. But if it is not then the answer is


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

#14 2014-01-22 04:40:01

bronxsystem
Full Member

Offline

Re: mixed fraction

the answer in book was in line with the typo



but thank you (: i will save this thread and review the problem assuming it was a2 and try work it out using your working (:

thanks thanks thanks

Last edited by bronxsystem (2014-01-22 04:40:24)

#15 2014-01-22 04:46:32

bobbym
Administrator

Offline

Re: mixed fraction

Hi;

Yes, that is more likely to be the problem. Review what has posted up above to get that answer.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Board footer

Powered by FluxBB