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