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February 22nd, 2015, 07:58 AM   #1
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DNE term invalidates entire equation?

I assume that any term that does not exist would invalidate an equation, but don't trust it as an intuition. Can I just toss the invalid terms? (=0)

Last edited by skipjack; February 22nd, 2015 at 09:42 PM.
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February 22nd, 2015, 08:30 AM   #2
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Please provide an example of an equation where a term "does not exist" so that someone may comment on your question ...
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Last edited by skipjack; February 22nd, 2015 at 09:42 PM.
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February 22nd, 2015, 09:05 AM   #3
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For example, when a square root of a negative number is a term...

super simplified... 1 + sqrt(-1) =0 (at the level of instruction before imaginary numbers are introduced.)

Last edited by skipjack; February 22nd, 2015 at 09:43 PM.
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February 22nd, 2015, 09:27 AM   #4
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That makes no sense with or without the square root term.

But no, you can't just discard terms that you don't like. At the very least you must explain why it's a valid thing to do.
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February 22nd, 2015, 09:47 AM   #5
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Oops I meant minus instead of plus, but point taken. I'm a chronic sign switcher. wip. Thanks.

Last edited by skipjack; February 22nd, 2015 at 09:44 PM.
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February 22nd, 2015, 09:51 AM   #6
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Oh, and zero instead of one... brain f**t.

Last edited by skipjack; February 22nd, 2015 at 09:46 PM.
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February 22nd, 2015, 10:00 AM   #7
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Quote:
Originally Posted by buckky View Post
Oops I meant minus instead of plus, but point taken. I'm a chronic sign switcher. wip. Thanks.
Quote:
Oh, and zero instead of one... brain f**t.
huh?

Last edited by skipjack; February 22nd, 2015 at 09:45 PM.
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