guyz what was the answer of no. of rectangles formed by joining dots??sum1 knw how to solve it....

• 19 rectangles
  
• 9 years agoHelpfull: Yes(3) No(0)
• i think 21 rectangles
  
• 9 years agoHelpfull: Yes(0) No(1)
• what is the solution of * marks question n3+24n+1959/n-2. plese solve it
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• Ans. for number of solution for above eqn is 9.
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• plzz tell with proper explanation.........
• 9 years agoHelpfull: Yes(0) No(0)
• Notice thatthat:
  n^3+24n+1959/n-2 =
  n^2+2n+28+2015/(n− 2)
  , so the fraction
  is an integer if and only if n − 2 is a factor of 2015. There are 8 positive factors of
  2015, and together with the case n = 1 there are 9 possible values of n.
• 9 years agoHelpfull: Yes(0) No(4)
• Frnds, I have written email 70 words instead of 50 words. Will they evaluate r not.
• 9 years agoHelpfull: Yes(0) No(0)
• min is 50 words...max we can write upto 100...i hv written 85.
• 9 years agoHelpfull: Yes(0) No(0)