a. Find the 21 st and 42 nd terms of the sequence defined by:
`t_(n)={(0,"if n is odd"),(1,"if n is even"):}`
(b) Find the 18 th and 25 th terms of the sequence defined by
`t_(n)={(n(n+2),"if n is even natural number"),((4n)/(n^(2)+1),"ifn is odd natural number"):}`
(c) Find the 440th and 441st terms of the sequance given by:
`t_(n)={(n/(n/44-1),"If n is not the square ofa natural nunber"),(2.7,"if n is the square of a natural number"):}`

Answer

(a) 0,1 (b) `360, 50/313` (c) 48 8/9, 2.7`