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RS AGGARWAL-PERMUTATIONS-EXERCISE 8A
- Compute: (i) (9!)/((5!)xx(3!))" " (ii) (32!)/(29!)" " (iii) ...
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- Prove that LCM {6!, 7!, 8!} = 8!.
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- Prove that (1)/(10!) +(1)/(11!)+(1)/(12!)=(145)/(12!).
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- If (1)/(6!) +(1)/(7!) = (x)/(8!), find x.
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- Write the following products in factorial notaion: (i) 6xx7xx8xx9x...
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- Which of the following are true or false? (2+3)! = 2 !+3! " (i...
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- If (n+1)! =12xx(n-1)!, find the value of n.
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- if (n+2)! =2550xxn!, find the value of n.
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- If (n+3)! =56xx(n+1)!, find the value of n.
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- If (n!)/((2!)xx(n-2)!): (n!)/((4!)xx(n-4)!)=2:1, find the value of n.
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- If ((2n!))/((3!)xx(2n-3)!): (n!)/((2!)xx(n-2)!)=44:3, find the value o...
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- Evaluate (n!)/((r!)xx(n-r)!), when n = 15 and r = 12.
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- Proove that (n+2)xx(n!)=(n!)+(n+1)!.
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- Prove that : (i) (n!)/(r!)=n(n-1)(n-2)...(r+1) (ii) (n-r+1)*(n!)...
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