... Brian, So far in this group you've called factoring and the quadratic formula worthless and/or uninteresting, and declined (aside from one sentence about...
Well said, adh. As for myself, I was wondering why someone who thinks "so much math is worthless" would even be a member of this group. As I think I've...
... purpose. Sorry you feel that way Brian. They do have a purpose though: Look outside of your window. It's a non-linear world out there. And Mathematics is...
For many of these problems, the case-by-case method works well. See also other post re: the importance of organizing cases. However, one should also recall...
I finished the questinos, and in the end I ended up wut the following answers for the absolute values within an absolute values questions. THe questions were: ...
#2 is almost a trick question. It is true for all real numbers. ... #4 I don't understand your answer the way it is stated, but it is on the right track. It...
... following ... questions. ... Correct! ... No, simply any real number ... Yes ... Almost. answer should be x > and equal to 6, or -4 < and equal to x < and...
In a message dated 2004-11-02 6:56:00 AM Eastern Standard Time, brianejensen ... So much of *everything* is worthless until you need it, and then it's ...
RE: Brian's posts To check these answers, I would use the graphical method, y= on a graphing calculator and look-see. Don't let other posts re: utility of...
I agree with Adam here about some aspects of the graphing method. However I do not believe that the graphing method should be the primary method used. The key...
Hello everybody That was long ago and yet waiting for solving the puzzle . I have saved the posts in tread in following forum for your convenience. ...
... effects, ... by . . . ... RSA ... Let me take a guess... It's either FlT or Erasthnese number seive or quadradic residues? Here's what I found in a book...
hello everybody,! It's about a small puzzle of mental calculus: U have 4 numbers 1, 5, 6 and 7. With elementary operation (+, -, *, /) try to form 21 . PS: use...
... Adam, No post espousing the utility of mathematical thinking claimed that graphing is "bad, wrong, or less worthy than [algebraic or analytic] methods", or...
Perhaps many of you already know, can you find all numbers that equal the sum of the cubes of the digits in that number? eg. consider 236 2^3 = 8 ; 3^3 = 27 ;...
... First, find the largest possible such number. 9^3 = 729 4*9^3 = 2916 < 3000 Its possible to narrow this bound further, but not required. Two numbers are...
... A maths/arithmetic puzzle set for school students in the 1900s [you will see that the early 2000s are no fun] was to check for a "good year" A "good year"...
Please provide some clues to these questions! THank you 1) Show that the sum of 1 + 1/2 + 1/4 + . . . + t to the n is always less than 2, no matter what the...
Let X be a real valued random variable with E|X| < \infty. Let m_X = E(X). Now let d be a real number and define Y = min(X,d). Let m_Y = E (Y). Suppose that f...
... always ... If you have previousy derived [or been told] the gemetric series formula [algebraic sumary of the series] you know sum = 1(1-0.5^n)/(1-0.5) ... ...
1 and 2a are almost same, so I'll do them together. Considering the sum of n terms S = a + ar + ar^2 + ar^3 + ... + ar^(n-1) rS = ar + ar^2 + ar^3 + ... +...
Hello All Here is a nice problem. A string of characters made of 'a's and 'b's is called a "Good" string if it has the same number of 'a's and 'b's. for...
... I may be slow, but what is a prifix? Do you mean a prefix? Even so, further explanation is needed, since if you do mean prefix, I still don't understand....
Hello 1-By "prifix" I mean prefix.Sorry for misspell. 2-The nonempty string u is called a prefix of string v if there exits a nonempty string x so that v = u...
Hi, All! I've been frustrated, trying to figure out why my 10-year-old son is struggling so much with math. He gets good grades in every other subject, so...
Hi all Assume S is primitive good string with length j, and Pi is any prefix of S with length I, And Npa = number of a's in the prefix P And Npb = number of...
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