Find the indicated terms in each of the following sequences whose nth terms are:
(i) 
(ii) 
(iii) 
(iv) 
(v) 
(i) 
Put n = 12
A12= 5(12) – 4
= 60-4 = 56
Put n = 15
A15= 5(15) – 4
= 75-4 = 71
Put n = 7
A7= 
= 
= 
Put n = 8
A8= 
= 
= 
Put n = 5
A5= 5(5-1) (5-2)
= 5(4)(3) = 60
Put n = 8
A8= 8(8-1) (8-2)
= 8(7)(6) = 336
Put n = 1
A1= 1(1-1) (2-1) (2-2) (3+2)
= 0
Put n = 2
A2= 2(2-1) (2-2) (3+2)
= 0
Put n = 3
A3= 3(3-1) (2-3) (3+3)
= 3 (2) (-1) (6)
= 36
Put n = 3
A3= (-1)3 (3) = -3
Put n = 5
A5= (-1)5 (5) = -5
Put n = 8
A8= (-1)8 (8) = 8
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