Limits

lim (n!/(mn)n)1/n, (m ε N) is equal to?????
n→∞

15 Answers

13
MAK ·

is the answer 1/m...?

1
Aditya ·

No it is 1/em

1
Aditya ·

cud u plz post ur attempt

13
MAK ·

its an odd one... dont wanna mislead ur concepts... [6]

13
MAK ·

its an odd one... dont wanna mislead ur concepts... [6]

1
Aditya ·

At least give me some idea!

13
MAK ·

i'll try... wait for 5mins... [1]

13
MAK ·

lim 1/m [n.(n-1).(n-2)... 1 / n^n]^1/n
n→∞

1/m . lim [1.(1-1/n).(1-2/n)...(1-n/n)]^1/n
n→∞

now, let k = lim [1.(1-1/n).(1-2/n)... (1-n/n)]^1/n
n→∞

=> log k = lim 1/n [ log 1 + log(1-1/n) + log(1-2/n) + ... log(1-n/n)]
n→∞

now as x --> 0 , logx --> -∞ and as n→∞ ... log k ~ -1

=> k = e^-1

=> ans is k/m = 1/em....

{well, i'm not sure whether the procedure is mathematically approvable or not... [6]sorry if it's wrong... [2] }

62
Lokesh Verma ·

i think there is some problem with ur soln MAQ

I will try to post my own...

13
MAK ·

yes bro... wid pleasure... i know dat i'm wrong... my solution is answer oriented one... [4]

u better post d correct solution... [1]

1
Aditya ·

Yet, there isnt any conceptual mistake, i think!
U have just cancelled off n and nn, right????

13
MAK ·

nope... i've divided each n evry term of n! wid n... so 'n' terms are divided by 'n' n's...!!!

dat is not d mistake... d mistake is in my interpretation of d limit as -1... i think dat interpretation is not completely correct...!!!

1
Aditya ·

okk...... n actually i didnt think much abt ur interpretation of the limit as -1......

62
Lokesh Verma ·

now as x --> 0 , logx --> -∞ and as n→∞ ... log k ~ -1

=> k = e^-1

=> ans is k/m = 1/em....

{well, i'm not sure whether the procedure is mathematically approvable or not... sorry if it's wrong... }

The solution follows...

btw scan pe mat jao..

1
Aditya ·

Thanks!!!

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