mooooom Posted June 23, 2009 Share Posted June 23, 2009 I can't even figure out how to "draw it" on here: it is two vertical lines, a number and then two more vertical lines - like an absolute except with an extra line on each side. Found this in our PSAT practice book. We've completed Algebra 1 and Geometry, both w/ Jacobs. Did we miss this somewhere? Thanks Quote Link to comment Share on other sites More sharing options...
Jane in NC Posted June 23, 2009 Share Posted June 23, 2009 It is the norm or length often used with a vector. What is the problem that was given using the symbol? Quote Link to comment Share on other sites More sharing options...
mooooom Posted June 23, 2009 Author Share Posted June 23, 2009 The first: For any value of x, ||x|| = 2/3x(squared) the second: What is the value of ||6(squared)|| Quote Link to comment Share on other sites More sharing options...
KAR120C Posted June 23, 2009 Share Posted June 23, 2009 The first:For any value of x, ||x|| = 2/3x(squared) the second: What is the value of ||6(squared)|| I've always used it for magnitude of a vector... but it sounds like what they mean is if ||x|| were to mean 2/3x^2 (or whatever), then how do you interpret ||whatever we want to put in here||. Kind of like a different way to indicate a function... Quote Link to comment Share on other sites More sharing options...
Jane in NC Posted June 23, 2009 Share Posted June 23, 2009 I've always used it for magnitude of a vector... but it sounds like what they mean is if ||x|| were to mean 2/3x^2 (or whatever), then how do you interpret ||whatever we want to put in here||. Kind of like a different way to indicate a function... Agreeing that they are defining a function using this symbol. Be careful--the function applies to this problem and the author could define the symbol as a different function in another problem. So forget my earlier comment on the symbol as a norm of a vector since the problem you gave has nothing to do with vectors. Quote Link to comment Share on other sites More sharing options...
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