Richard is designing a new website for students to create study groups and collaborate with other students.
the site will launch with five study groups, each with its creator as its only member, and richard anticipates that two study groups will be added every month. he also estimates that seven new members will be added to each study group every month.
the estimate for the total number of group members is given by the polynomial expression below, where x is the number of months since the site's launch.