Vₙ method (reciprocal products in AP) (1/(V_k V_{k+1}) = (1/d)(1/V_k - 1/V_{k+1}) if V in AP)
jee-mainjee-advanced
1/(V_k V_{k+1}) = (1/d)(1/V_k - 1/V_{k+1}) if V in AP
What each symbol means
| Symbol | What it stands for |
|---|---|
| d | Common difference of V (non-zero) |
| V_k | AP term |
When to use this
Requires V_{k+1}-V_k = d constant.