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The ninth term of ^1⁄3, ^1⁄7, ^1⁄11, ^1⁄15, ^1⁄19,……… is given by?(a) ^1⁄35(b) ^1⁄36(c) ^1⁄39(d) None of the mentionedThis question was addressed to me during an online exam.Query is from Harmonic Sequences in section Basic Structures: Sets, Functions, Sequences, Sums and Matrices of Discrete Mathematics

Answer»

The correct CHOICE is (a) ^1⁄35

Explanation: Since here a1^-1, a2^-1……… are in AP THUS a9 = 3 + (9-1)4 = 35, ^1⁄35 is H9 TERM of the series.



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