3. Which of the following is the common difference in the sequence: 3, -2, - 7...? a. 1 b. -5 al c. 5 d. - 1 4. Which of the missing term in this arithmetic sequence: 23, 18, 13, 8, 3 -7, -12,... ? a.-2 b. 2 c. -5 d. 5 1. 5. Which of the following is the common difference in the sequence: -7,-4,-1,2,5..? a.-3 b.3 c.4 d.-4
