For two number a,b HM between them is given by?(a) (2b+2a )/3b(b) 2ab/(a+b)(c) (a+b)/2ab(d) 2b/(a+b)This question was posed to me in an internship interview.My doubt is from Harmonic Sequences in section Basic Structures: Sets, Functions, Sequences, Sums and Matrices of Discrete Mathematics

For two number a,b HM between them is given by?(a) (2b+2a )/3b(b) 2ab/

1.	For two number a,b HM between them is given by?(a) (2b+2a )/3b(b) 2ab/(a+b)(c) (a+b)/2ab(d) 2b/(a+b)This question was posed to me in an internship interview.My doubt is from Harmonic Sequences in section Basic Structures: Sets, Functions, Sequences, Sums and Matrices of Discrete Mathematics
Answer» Correct choice is (b) 2ab/(a+b) The BEST explanation: Let C be the hm, ^2⁄c = ^1⁄a + ^1⁄b (AM PROPERTY), c = 2B/(a+b).

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