QUESTION 1: The answers are GEOMETRIC and 256.
QUESTION 2: The answer is 3.
QUESTION 3: The answer is tn = -9n + 42
QUESTION 4: The answer is tn = 2n + 4
QUESTION 5: The answer is tn = 1*3^(n-1) (THE SECOND CHOICE)
QUESTION 6: The answer is tn = 1*(1/2)^(n-1) (THE THIRD CHOICE)
QUESTION 7: The answer is 26.
QUESTION 8: The answer is 3.