The previous page is sending you to https://www.chegg.com/homework-help/questions-and-answers/d-g-t-p-s-d-t-v-d-p-sigma-t-alpha-p-d-t-left-v-o-beta-p-alpha-t-right-d-p-sigma-alpha-v-o--q103353601.

 If you do not want to visit that page, you can return to the previous page.