Q10 of 97 Page 180

Find the indicated terms in each of the sequences in whose nth terms are:

In the given expression the value of nth term is


We have to find out value of a20 , putting the value of n = 20 in given expression



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8

Find the indicated terms in each of the sequences in whose nth terms are:

 9

Find the indicated terms in each of the sequences in whose nth terms are:

an= (-1)n-1 n3 ; a9

 11

Write the first five terms of each of the sequences in and obtain the corresponding series:

a1 = 3, an = 3an – 1 + 2 for all n > 1

 12

Write the first five terms of each of the sequences in and obtain the corresponding series: