A) \[\frac{1}{24},\frac{1}{26}\]
B) \[\frac{1}{24},\frac{1}{28}\]
C) \[\frac{1}{26},\frac{1}{30}\]
D) \[\frac{1}{30},\frac{1}{31}\]
Correct Answer: B
Solution :
(b): After inserting the harmonic means Let the harmonic progression be \[\frac{1}{a},\frac{1}{a+d},\frac{1}{a+2d},\frac{1}{a+3d}\] \[\Rightarrow \]\[a=20;a+3d=32\] \[\Rightarrow \]\[d=4\] \[\therefore \] The required harmonic means are \[\frac{1}{24},\frac{1}{28}\]You need to login to perform this action.
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