Answer: 7866 Step-by-step explanation: We need to find 20th term i.e. a20 Let an = (n-1) (2-n) (3 + n) putting n = 20 in (1) a20 = (20-1) (2-20) (3 + 20) = (19) ( 18) (23) = 7866. Hence the 20th term is 7866. Reply

Answer: 7866Step-by-step explanation:We need to find 20th term i.e.

a20 Let an = (n-1) (2-n) (3 + n) putting n = 20 in (1) a20 = (20-1) (2-20) (3 + 20) = (19) ( 18) (23) = 7866.

Hence the 20th term is 7866.