Recent content by Ownaginatious

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    Combinatorics Problem: Finding Samples with Non-Conforming Chips

    So here is the problem: Now what seems logical to me is first choose 1 of the 10 non-performing and then choose 4 from the remaining 139 chips. What is wrong with my logic here? I don't get the answer the book gets (130,721,752), and instead get 148, 916, 260.
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    Can someone confirm these English to predicate logic problems for me?

    Oh awesome :) Thank you very much for you help!
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    Can someone confirm these English to predicate logic problems for me?

    Well, as given in our book, the syntax they want us to use is the following: (*x | R : P) R = Range, P = Body, * = operator/function, x = variable(s). The ':' is also used to represent type (i.e. x : Z = x of type integer). In class my professor just left out R or made it "true" when he...
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    Can someone confirm these English to predicate logic problems for me?

    Oh I was led to believe that that's the equivalent to saying "over the whole domain", which is the equivalent to just putting "true" there.
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    Can someone confirm these English to predicate logic problems for me?

    Ya, I was wondering that exact same thing sylas. My textbook talks a lot about how English is so ambiguous, so I'm going to assume that whether this applies to one student or all students is open to my interpretation ;).
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    Can someone confirm these English to predicate logic problems for me?

    Homework Statement I actually have to problems I would just like someone to confirm for me. I have several other problems similar to these, and I don't want to waste time in case I do not understand the fundamentals. Anyway: a) Define suitable predicates and functions and then formalize...
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    How do I simplify this boolean function using the rules of boolean algebra?

    Well, according to this truth table, it's right: http://img170.imageshack.us/img170/3023/truth.png I can't figure out how to prove this algebraically though.
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    How do I simplify this boolean function using the rules of boolean algebra?

    Okay, so I'm stuck at a step of a much bigger problem where I have to simplify a boolean function. Homework Statement Here is where I'm stuck, I have to change the left hand side to the right hand side. How do I prove this with the rules of boolean algebra? CA + CB + B'A = CB + B'A...
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    Find (AB)^-1 with Given Matrices | Inverse of 2x2 Matrices

    Nope, the book says what I wrote. I'm not surprised though; I've found several typos in the questions in this particular textbook... Thanks a lot for the clarification, I thought maybe I was missing some obscure rule :p. Also, thanks for showing how to use the LaTex code properly :)
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    Find (AB)^-1 with Given Matrices | Inverse of 2x2 Matrices

    Homework Statement Use the given matrices to find (AB)^-1 (These are 2 X 2 matrices, please ignore the fraction bar in between the top and bottom elements. I can't figure this stupid latex piece of crap out) A^{-1} = \left(\frac{\frac{1}{2}}{\frac{-1}{2}} \ldots...
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    Solving Resolution Problem Homework Statement

    Okay, great, that yields a correct answer :) If you don't mind rl.bhat, could you show me how you derived that (D/485)/d? EDIT: Oh wait, never mind, I just realized that you just used s = (radius)*(theta). Thanks again!
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    Solving Resolution Problem Homework Statement

    I'm still unsure of how to solve the problem...
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    Simple single-slit sound diffraction

    Well, I'm guessing it's a single speaker because it doesn't really specify a second one in the question.
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    Solving Resolution Problem Homework Statement

    But what would the upper-case D represent?
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    Solving Resolution Problem Homework Statement

    But there is no vertical dimension of the screen :s
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