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March 04, 2026, 01:35:40 pm

Author Topic: a simple question aha  (Read 962 times)  Share 

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Inside Out

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a simple question aha
« on: May 21, 2011, 11:59:17 pm »
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why does |ex-2|= ex+2

onur369

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Re: a simple question aha
« Reply #1 on: May 22, 2011, 12:03:10 am »
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Its in a modulus function, the two pipes out site the function make everything positive.
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kamil9876

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Re: a simple question aha
« Reply #2 on: May 22, 2011, 12:13:59 am »
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clearly false. What if x=0? you get 1 for the LHS but 3 for the RHS.
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xZero

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Re: a simple question aha
« Reply #3 on: May 22, 2011, 12:16:07 am »
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Its in a modulus function, the two pipes out site the function make everything positive.
thts wrong, the graph of |e^x - 2| and e^x +2 is completely different
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nacho

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Re: a simple question aha
« Reply #4 on: May 22, 2011, 11:06:11 am »
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Its in a modulus function, the two pipes out site the function make everything positive.
Actually think of it like this:
let U be a number
|-U| = U
If U = 3x-4,
|3x-4| does not equal 3x+4. The modulus isn't a negative and positive sign, making all signs positive.
« Last Edit: May 23, 2011, 06:03:06 pm by nacho »
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r_damico

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Re: a simple question aha
« Reply #5 on: May 24, 2011, 07:23:50 pm »
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Its in a modulus function, the two pipes out site the function make everything positive.


|ex-2|= ex-2 for when x > ln(2)
                   or
         = -ex+2 for when x < ln(2)

a modulus takes the positive and negative of what ever is inside
« Last Edit: May 24, 2011, 07:28:26 pm by r_damico »
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