CBSE Class 10 Answered
Arithmetic Progression
Asked by | 19 Sep, 2008, 02:23: PM
Expert Answer
(1) given a1= -1 , an=an-1/n , n 2
simply put n=2,3,4,5,6 in the expression of an
a2 = -1/2 ,a3 = -1/6 , a4 = -1/24 , a5 = -1/120 ,a6 = -1/720
(2) a1=4 , an=4an-1 + 3 , n > 1
a2=4a1 + 3= 19
a3=4a2 + 3= 79
a4=4a3 + 3= 319
a5=4a4 + 3= 1279
a6=4a5 + 3= 5119
Answered by | 19 Sep, 2008, 09:46: PM
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