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An Euler diagram and a logic argument |
2008-09-18 |
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Regina pose la question :
Use a Euler diagram to determine whether the following argument is valid or invalid.
No wizard can yodel
All lizards can yodel
No wizard is a lizard
Penny Nom lui répond. |
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A complex number in polar form |
2007-07-23 |
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roland pose la question :
write the given complex number z in polar form lzl(p+qi) where lp + qil=1 for 3 - 4i.
Harley Weston lui répond. |
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Exponential form of complex numbers |
2007-02-12 |
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Austin pose la question :
When dealing with imaginary numbers in engineering, I am having trouble getting things into the exponential form. The equation is -1+i now I do know that re^(theta)i = r*cos(theta) + r*i*sin(theta). Just not quite understanding the order of operations. Thanks
Penny Nom lui répond. |
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| n + 4 | + | 3 - 2n | = 16 |
2002-05-24 |
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Randall pose la question :
I don't seem to be able to solve this: | n + 4 | + | 3 - 2n | = 16
Penny Nom lui répond. |
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An Invalid Argument |
1999-05-31 |
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Rod Redding pose la question :
Can an invalid argument have a true conclusion? If yes then why?
Walter Whiteley lui répond. |
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A |
1999-05-02 |
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Leah pose la question :
a=b
a^2=ab
a^2+b^2=ab-b^2
(a-b)(a+b)=b(a-b)
a+b=b
b
2=1 why is this proof wrong?
Penny Nom lui répond. |
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