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September 25, 2026, 06:20:04 am
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Author Topic: Questions on Addition of Ordinates  (Read 3609 times)  Share 

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darkphoenix

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Re: Questions on Addition of Ordinates
« Reply #15 on: February 06, 2010, 10:29:20 pm »
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Um care to show the working out involved?
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superflya

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Re: Questions on Addition of Ordinates
« Reply #16 on: February 06, 2010, 10:38:28 pm »
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k^2>64

k> 8
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TrueTears

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Re: Questions on Addition of Ordinates
« Reply #17 on: February 06, 2010, 10:41:05 pm »
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Quote from: superflya on February 06, 2010, 10:38:28 pm
k^2>64

k> 8
recheck working :P


-2>-8

(-2)^2>64 false
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superflya

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Re: Questions on Addition of Ordinates
« Reply #18 on: February 06, 2010, 10:44:03 pm »
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-.- gahh
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TrueTears

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Re: Questions on Addition of Ordinates
« Reply #19 on: February 06, 2010, 10:46:23 pm »
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k^2-64 > 0

sketch graph solve
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superflya

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Re: Questions on Addition of Ordinates
« Reply #20 on: February 06, 2010, 11:01:09 pm »
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yep got it :)
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TrueTears

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Re: Questions on Addition of Ordinates
« Reply #21 on: February 06, 2010, 11:01:24 pm »
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whatta pr0 kent
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Mao

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Re: Questions on Addition of Ordinates
« Reply #22 on: February 06, 2010, 11:05:52 pm »
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Another approach (note that ):

When solving quadratics, the logical process is

Where the third step is often omitted.

Following the above logic,
« Last Edit: February 06, 2010, 11:07:33 pm by Mao »
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darkphoenix

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Re: Questions on Addition of Ordinates
« Reply #23 on: February 06, 2010, 11:17:53 pm »
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Does the modulus sign basically mean + or - k?
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TrueTears

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Re: Questions on Addition of Ordinates
« Reply #24 on: February 06, 2010, 11:20:54 pm »
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Quote from: darkphoenix on February 06, 2010, 11:17:53 pm
Does the modulus sign basically mean + or - k?
Think of the modulus like this

|k| = ck where c = +1 if k=>0 or - 1 if k<0
« Last Edit: February 06, 2010, 11:40:51 pm by TrueTears »
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darkphoenix

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Re: Questions on Addition of Ordinates
« Reply #25 on: February 06, 2010, 11:39:05 pm »
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Alrite thanks to everyone that helped.
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