Use the formula for the sum of the first n integers and/or the formula for the sum of a geometric sequence to evaluate the sums to write them in closed form.Execise5 + 10 + 15 + 20 + … + 300

QUIZ NEXT TUES, STUDY & GET ● PENCIL NOT PEN ● CALCULATOR ● V # DON’T GET ● SCANTRON [polo will provide <3] CHECK BB FOR TOPIC ● Mostly CHAPTER 2 NAMING COMPOUNDS AND PARTS OF ATOM + some review of ch 1 CH 2 I. AMU Rarely use mass in grams for subatomic particles, we use AMU (1.66E24) [don’t need to memorize #, will be given] Atomic weight (atomic mass) of an element is the weighted average of AL isotopes present in nature Atoms are too small for grams, so we use Atomic Mass Unit (amu) Finding Average Mass Practice Problems + 1. 12 amu 6 p C (98.89% abundance, mass= 12.000 amu) and