Question

( frac{1}{1-n-1}+frac{1}{3 ! n-3 !}+frac{1}{n-11} )
Myltiply & druide by ( n ) j
( frac{1}{n !}left(frac{n !}{n-1}+frac{n !}{n ! n-3 !}+frac{n !}{n-1 ! 1}right) )
( frac{1}{n !}left[n_{1}+n_{3}+frac{n}{n-1}right] )
( x_{1}+y_{3}+frac{x}{4-1}=2^{n-1} )
( =frac{1}{n !} 2^{n-1} )

# If neN&n is even, then, 1.(n-)! 3!(13)! 5!() (A) 2 (C) 2 ! (D) none of these In the anni

Solution