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Find 3nP4=5(n-1)P4 , for n>4 ?   (From 7th chapter permutations and combinations.)

Asked by antonyjojy999 15th January 2016, 7:11 PM
Answered by Expert
Answer:

U s e space p e r m u t a t i o n space f o r m u l a straight P presuperscript straight n subscript straight r equals fraction numerator straight n factorial over denominator open parentheses straight n minus straight r close parentheses factorial end fraction F i r s t space s o l v e space R H S space t h e n space s o v e space L H S. E q u a t e space b o t h space t h e space s i d e s space y o u space w i l l space g e t space o n e space e q u a t i o n. N o w space c h e c k space f o r space straight n space greater than 4

Answered by Expert 18th January 2016, 6:40 PM
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