Question

18. The value of (2.P. - 3.2P, + 4.P2 - ... up to 51th term)
+ (1! - 2! + 3! - ... up to 51 th term) is equal to
(a) 1 - 51(51)!
(b) 1 + (51)!
(c) 1 + (52)!
(d) 1​

Answer 1

Answer:

I think d is correct answer