List the elements {a1, a2, a3, ...} where an is defined as a1 =1, an = na n-1, n E N, 1 < n < 7
Out of 2 marks
Need someone to check my answer please!
Answer:
When n=2, a3 = (2)a 2-1
= (2) (1)
= 2
When n=3, a3 = (3)a 3-1
= (3) (2)
= 6
When n=4, a4 = (4)a 4-1
= (4) (6)
= 24
When n=5, a5 = (5)a 5-1
= (5) (24)
= 120
When n=6, a6 = (6)a 6-1
= (6) (120)
= 720
Therefore the solution set is {2,6,24,120,720} Is this correct?