Q.

The nth term of the sequence 212,1713,119,2023. is

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a

155n+3

b

205n+4

c

205n+3

d

205n+2

answer is C.

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Detailed Solution

The given sequence can be written as  52,2013,109,2023,⋯The reciprocal of the number820,1320,1820,2320,⋯This is an A.Pnth  term of this A.P. isan=8+5(n−1)20=3+5n20Thus, nth term of the given sequence is 205n+3
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