Talk me down please... "geometry for dummies"

[BCEagle91]

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<p>You are trying to prove what using a logic example from a 1973
textbook? This isn’t typically taught in today’s “college algebra”
course. I’ve taught college algebra, college algebra and trig, and
finite mathematics numerous times. I also took college algebra and
pre-calculus as an undergrad. They were basically remediation
courses and didn’t involve logic or texts from 1973. One of the
courses involved some fairly obscure factoring theorems, but that’s
about the extent of the novelty.</p>

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<p>You originally wrote:</p>

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<blockquote>
<blockquote>
<p>I hate to beat this to death, but there is no such thing as
“college algebra” as you are using the term.</p>
</blockquote>
</blockquote>

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<p>Perhaps you’re familiar with trying to prove the negation of an
existential quantifier.</p>

<p>[Amazon.com:</a> College Algebra (9780132402866): Michael Sullivan: Books](<a href=“http://www.amazon.com/College-Algebra-Michael-Sullivan/dp/0132402866#reader_0132402866]Amazon.com:”>http://www.amazon.com/College-Algebra-Michael-Sullivan/dp/0132402866#reader_0132402866)</p>

<p>Composite functions
One-to-One functions
Inverse functions
Conic sections
Induction
Vectors</p>

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<p>ETA: DS has had Geometry, Algebra 2, and Pre-calc, and is now in AP
calc, and he says he understands your example just fine.</p>

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<p>I would expect someone that has passed precalc to be able to understand
that paragraph. But I wouldn’t expect most that passed Algebra 2 but
have not yet taken precal to understand it.</p>