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 Post subject: Another questionPosted: Tue, 27 Dec 2011 14:19:03 UTC
 Senior Member

Joined: Sun, 25 Dec 2011 00:28:25 UTC
Posts: 95
Here's another problem! (Maybe Easy...)
, find

I attempted to solve this one but I only got here:

I really don't know what to do...I tried to solve this one on Microsoft mathematics
but it doesn't actually showed me how to solve it. Only gave me a result that
not exactly -2 but approximately (I don't know how to write that sign, I hope you know what I mean)

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 Post subject: Re: I need help badly !Posted: Tue, 27 Dec 2011 16:44:10 UTC
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Joined: Sun, 25 Dec 2011 08:28:42 UTC
Posts: 12
I think i can help!
Upto where you ended its correct,then from there you are supposed to substitute a value on "x" so as to make the exponent zero(0),since if you make the exponent zero you can get the same value on each side which is one,thus it means the value of "x" you substituted is correct.The only value you can substitute on "x" to make the exponent zero is "-2",thus "x=-2".

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 Post subject: Re: I need help badly !Posted: Tue, 27 Dec 2011 17:41:57 UTC
 Senior Member

Joined: Sun, 25 Dec 2011 00:28:25 UTC
Posts: 95
As much as I understand, you told me this
So...

and we know that..."Example"

So, this should be like ==>

and here's the solution:

Thank you very much my friend...

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 Post subject: Re: I need help badly !Posted: Tue, 27 Dec 2011 19:23:18 UTC
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Joined: Wed, 30 Mar 2005 04:25:14 UTC
Posts: 12172
Location: Austin, TX
If you have other questions, make your own topics for them. Topic split.

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 Post subject: Re: I need help badly !Posted: Tue, 27 Dec 2011 21:44:49 UTC
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kreshnik wrote:
and we know that..."Example"

Keep it simple: x^(2-2) = x^0 = 1

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 Post subject: Re: I need help badly !Posted: Tue, 27 Dec 2011 22:01:51 UTC
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Denis wrote:
kreshnik wrote:
and we know that..."Example"

Keep it simple: x^(2-2) = x^0 = 1

Indeed, and of course .

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 Post subject: Re: I need help badly !Posted: Wed, 28 Dec 2011 01:34:15 UTC
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...and of course .

Why not?

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 Post subject: Re: I need help badly !Posted: Wed, 28 Dec 2011 05:03:33 UTC
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Denis wrote:
...and of course .

Why not?

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 Post subject: Re: Another questionPosted: Wed, 28 Dec 2011 06:00:33 UTC
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You'd see: 0^0 = 1

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 Post subject: Re: Another questionPosted: Wed, 28 Dec 2011 06:01:48 UTC
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Denis wrote:
You'd see: 0^0 = 1

Oh, don't get me started on "what 0^0 is".

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 Post subject: Re: I need help badly !Posted: Wed, 28 Dec 2011 10:21:28 UTC
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Joined: Sun, 25 Dec 2011 08:28:42 UTC
Posts: 12
Yeah,exactly!and you are welcome.
k
reshnik wrote:
As much as I understand, you told me this
So...

and we know that..."Example"

So, this should be like ==>

and here's the solution:

Thank you very much my friend...

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 Post subject: Re: Another questionPosted: Sat, 31 Dec 2011 05:10:40 UTC
 S.O.S. Oldtimer

Joined: Fri, 27 Jul 2007 10:17:26 UTC
Posts: 278
Location: Chandler, AZ, USA
Another (similar) approach:

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 Post subject: Re: Another questionPosted: Sat, 31 Dec 2011 09:47:04 UTC
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Using logs is cheating, Alstat

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 Post subject: Re: Another questionPosted: Sat, 31 Dec 2011 19:54:57 UTC
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Denis wrote:
Using logs is cheating, Alstat

how do you know it was logs and not inspection?

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 Post subject: Re: Another questionPosted: Sat, 31 Dec 2011 21:39:20 UTC
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tweet tweet...a ------ ---- ---- -- so !

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