Question

If (n+1)! = 12 X (n-1) ! then value of n is​

Answer 1

13 = 12n - n
13 = 11n
n = 13/11

Answer 2

Answer:

The value of n is 3.

Step-by-step explanation:

Step 1:

(n+1)! = 12 X (n-1) !

Step 2:

As we know,n!=nx(n-1)×(n-2)!

(n+1)! can be written as (n+1)×(n)×(n-1)!

Step 3:

Therefore

(n+1×(n)×(n-1)!/(n-1)=12

Step 4:

(n+1)×(n)=12(because (n-1)! is gets cancelled out)

Since 12 can be written as 4×3

Step 5:

(n+1)×n=4×3

On comparing both sides,

n+1=4; n=3

n=3

The value of n is 3.

Hope it will helps you....