I need help with these questions please. Fullexplanation provided please. Reference is: WCLN

Unit 10 Self-Assessment Mathematics Pre-Calculus 12 22. Find the common ratio for each of the following geometric series. Determine whether a sum to infinity exists. Find the sum where it exists. a) 9+ 3+1.... 1= 3 2 = 1 r = W / - r = S = Exemplary =5 Self Assessment No Attempt = 0 Beginning = 1 Emerging = 2 Developing = 3 Proficient = 4 b ) 7 - 1 + - - .... r = S = Self Assessment No Attempt = 0 Beginning = 1 Emerging = 2 Developing = 3 Proficient = 4 Exemplary =5 )-4+6-9+.... r = S = Self Assessment No Attempt = 0 Beginning = 1 Emerging = 2 Developing = 3 Proficient = 4 Exemplary =5 Page 12 of 16