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  1. ( r −a)• r = 0 means that vectors a, r , r -a form a right-angled triangle with a as hypotenuse From “angle in...

    1 Answers · Science & Mathematics · 27/10/2013

  2. For the line connecting points ( r , r ^2) and (-18,13) to be parallel with the line connecting (5,7) and (0,3...137 Use quadratic formula to find r : r = [4 +- sqrt(4^2 - 4(5)(-137)] / [2(5)] r = [4 +- sqrt(2756)] / 10 r = [4 +- 2sqrt(689)] / 10 r = [2 (2 +- sqrt(689)] / 10 r = (2...

    1 Answers · Science & Mathematics · 26/08/2010

  3. r '(t)=(2^t + e^t + e^(-t^2) + t)*x r "(t)=((2^t + e^t + e^(-t^2) + t)*x^2)/2 r '(t)=x*(ArcTan[t] + Tan[2*t]) r "(t)=(x^2*(ArcTan[t] + Tan[2*t]))/2

    1 Answers · Science & Mathematics · 09/09/2008

  4. r - 12 < 2r - 12 < 2r - r - 12 < r r - 12 Answer: Sure! That s accurate. r - 12.

    3 Answers · Science & Mathematics · 17/08/2009

  5. Since r is a root of x^5=1, so r ^5=1......(1) Since r not equal to 1,so r -1 not equal to 0. So ( r ^5-1)/( r -1)=0 [From (1)] =>1+ r +r²+r³+ r ^4=0...

    3 Answers · Science & Mathematics · 04/04/2008

  6. -( r + 3) > 9 -( r ) > 12 r < -12

    5 Answers · Science & Mathematics · 24/11/2010

  7. r +5=11 square the two sides ( √ r +5 ) ^2 = ( 11 )^2 r + 5 = 121 r = 121 - 5 r = 116

    9 Answers · Science & Mathematics · 15/06/2007

  8. 1.- u= (1-( r ^2/Ro^2)) du=( -2r/Ro^2)dr rdr = -(Ro/2) du = (-Ro^2/2) INT u du = (-Ro^2/2) u^2/2 = (-Ro^2/4) ((1-( r ^2/Ro^2)) ^2 Ro< r <1 = (-Ro...

    1 Answers · Science & Mathematics · 13/01/2012

  9. r and s are connected in parallel : & s is constant R = r || s = r s / ( r + s); a) dR / dr = [ s * ( r + s) - r s ] / [ ( r + s)^2...

    4 Answers · Science & Mathematics · 28/07/2014

  10. R = S (160T/S + T) R = 160TS/S + TS R = 160T + TS Hope this helps, Michael

    5 Answers · Science & Mathematics · 13/02/2013

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