Δ q = p q [ q ( W 2 − W 1 ) + p ( W 1 − W 0 ) ] W ¯ {\displaystyle \Delta q={\frac {pq\left[q(W_{2}-W_{1})+p(W_{1}-W_{0})\right]}{\bar {W}}}}
![{\displaystyle \Delta q={\frac {pq\left[q(W_{2}-W_{1})+p(W_{1}-W_{0})\right]}{\bar {W}}}}](/media/api/rest_v1/media/math/render/svg/23dfb4251107ad2a7637e46bfedc4499557e13ee)
