91- 6303239042
A sequence is in HP if reciprocals of its terms form an AP.
For three terms $$a, b, c$$ in HP:
$$ \frac{1}{b} - \frac{1}{a} = \frac{1}{c} - \frac{1}{b} \implies b = \frac{2ac}{a+c} $$
Sign in
Please select an account to continue using cracku.in
↓ →
Start your IIM journey with the right preparation and crack CAT 2026.
Educational materials for CAT preparation
