Under this assumption, during the first {{MATH_211}}-second interval, the object would move by {{MATH_212}}; during the second such time interval, the object would move by {{MATH_213}}, during the third time interval, the object would move by {{MATH_214}}, etc. During the entire time interval, the object would move by {{ENV_215}} Using sigma notation, notation for the length of each time interval, {{MATH_216}}, and notation for sample points, we write