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  1. Let r = (x(1), x(2), ..., x(n)). So, |r...x(2))^2 + ... + (x(n))^2]. Hence, r(hat) = (x(1)/√[(x(1))^2 + (x(2))^2...x(1))^2 + ... + (x(n))^2)^(-1/2) = (n-1)/|r|. In the case where n = 3, this ...

    1 Answers · Science & Mathematics · 13/03/2013

  2. r = ± 3 - √3, ± 1 - √3 so r IS irrational therefore it must be irrational s = ±√[r^2 + (√3)r.... Solve the resulting quartic equation: r^4 - 4r^2s^2 - 6r^2 + 4s^4 - 12s^2 + 9 = 0 for either "r" or...

    1 Answers · Science & Mathematics · 24/01/2010

  3. The correlation coefficient, r, is a measure of the linear relationship between two variables. If...the data tends to have a negative slope. Positive values for r indicate the data tends to have a positive slope. if r = 0 we say the ...

    7 Answers · Science & Mathematics · 03/01/2008

  4. (r − 3)(r + 9)=-9 => r(r + 9) −3(r + 9)= -9 => r^2 + 9r −3r − 27 = -9 => r^2 + 6r − 18 = 0 now...

    4 Answers · Science & Mathematics · 15/12/2013

  5. r/5 + 6/5 = r/7 + 8/7 7r + 42 = 5r + 40 2r = - 2 r = - 1 Answer: r = - 1 Checking: - 1/5 + 6/5 = - 1/7 + 8/7 5/5 = 7/7 1 = 1

    2 Answers · Science & Mathematics · 17/11/2010

  6. (r^2 - 4r - 5)/[5(r-5)] = (r-5)(r+1)/5(r-5) simplify by r-5: (r+1)/5 that's your result :) if you're not sure how to find roots of r^2 - 4r - 5, here's how you do it. 1. Find the delta (...

    5 Answers · Science & Mathematics · 07/10/2011

  7. y = r*sin(T) We know that r = 5*sin(T) which gives sin(T) = r/5 And r^2 = x^2...

    3 Answers · Science & Mathematics · 03/05/2010

  8. this can be written as r^2 + 3r - 2 = 0 Now to solve this you can use the discriminat method (delta = b^2...the method of completing the square. r^2 + 3r + (3/2)^2 - (3.2)^2 -2 =0 (r + 3/2)^2 = 9/4 + 2 = 17/4 r+3/2 = +or- sqrt(17/4) r = + sqrt(17/4) - 3/2 or...

    3 Answers · Science & Mathematics · 15/09/2010

  9. R= 1.1926, -4.1926 Try using MathWay.com Hope this helps!

    4 Answers · Science & Mathematics · 07/04/2013

  10. R^2 and R^3 are shorthand for RxR and RxRxR, where the operation "x" is a...set of the form X^n is the set of all n-tuples of elements of X. So, R^0 would be the set of all 0-tuples of real numbers. However, a 0-tuple is essentially...

    3 Answers · Science & Mathematics · 30/06/2010

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