TNPSC Group 1 · 2017 Preliminary Examination
165. \(a,\ b,\ c\) are said to be in Harmonic Progression if their reciprocals \(\dfrac{1}{a},\ \dfrac{1}{b},\ \dfrac{1}{c}\) are in Arithmetic progression. What would be the value of \(x\) for which \(3,\ x,\ 6\) are in Harmonic Progression.
Answer:
B.
\(4\)