1. What is the sum of the first four terms of the sequence: a1= -5 an = an - 1+3 2. What is the value of a4 for the sequence: a1 = 2 an = (-1)"-3dn - 1 3. Which of the numbered formula choices yields the following sequence: 2, 2V/2, 4, 4V/2,... 1) a = 2 3) a = 2 an = (1/2 ) a,-1 a141 = (V/2) a. 2 ) an = (V 2 ) " 4) All three choices are correct. 4. Which of the numbered choices represents the fifth term of the sequence: a = 9k a = n-1 1) 36k 2) 18k 3) 12k 4) 6k 5. Find the fourth term of the sequence: a1= 2 a2= 3 an = (-1)" . an - 1+ 2an - 2