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The series a,(a+b)/2, b is in _______(a) AP(b) GP(c) HP(d) None of the mentionedI had been asked this question by my school principal while I was bunking the class.Question is taken from Arithmetic and Geometric Mean in portion Basic Structures: Sets, Functions, Sequences, Sums and Matrices of Discrete Mathematics

Answer»

Right CHOICE is (a) AP

Easiest explanation: (a+b)/2 is AM between a, b. Hence SERIES is in AP.



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