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Important Results

  1. 487.png 
  2. 492.png 
  3. 497.png 
  4. If 502.png, then nPs is divisible by nPr.
  5. 507.png that is, 512.png and 517.png 
  6. 522.png 
  7. 527.png 
  8. 532.png
  9. 537.png 
  10. 542.png 
  11. 547.png 
  12. 552.png




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