These problems: the law of rectilinear motion of the body under consideration: S (t) = 3t ^ 2 + t + 1.
1) The law of change in the speed of the body under consideration: V (t) = S (t) ‘= (3t ^ 2 + t + 1)’ = 3 * 2 * t + 1 + 0 = 6t + 1.
2) Initial speed: V (0) = 6 * 0 + 1 = 1 m / s.
Answer: The initial speed was 1 m / s.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.