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if-P-2-n-m-72-and-P-2-n-m-210-find-the-value-of-m-and-n-

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Question Number 102269 by mohammad17 last updated on 07/Jul/20
if P_2 ^( n−m) =72 and P_2 ^( n+m) =210 find the value of m and n ?
ifP2n−m=72andP2n+m=210findthevalueofmandn?
Answered by Dwaipayan Shikari last updated on 07/Jul/20
(((n−m)!)/((n−m−2)!))=72 (n−m)(n−m−1)=72 a(a−1)=72 {take n−m as a a=9 so n−m=9 (((n+m)!)/((n+m−2)!))=210 (n+m)(n+m−1)=210 p(p−1)=210 { take n+m as p p=15 so n+m=15 so { ((n=12)),((m=3)) :}
(n−m)!(n−m−2)!=72(n−m)(n−m−1)=72a(a−1)=72{taken−masaa=9son−m=9(n+m)!(n+m−2)!=210(n+m)(n+m−1)=210p(p−1)=210{taken+maspp=15son+m=15so{n=12m=3
Commented by mohammad17 last updated on 08/Jul/20
thank you
thankyou

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