Question

n+2/n! -3n+1/(n+1)!​

Answer 1

Answer:

n+2/n! -3n+1/(n+1)!​

Step-by-step explanation:

Answer 2

Answer:

(n+1)!=12(n−1)!

(n(n+1)−12)(n−1)!=0 [n!=n(n−1)!]

As (n−1)! cannot be zero

=>(n(n+1)−12)=0

n

2

+n−12=0

n

2

+4n−3n−12=0

(n+4)(n−3)=0

Either n=−4 or n=3

For n=−4,(n−1)! is not defined

=> Value of n is 3