The sequence 20 , 11 , 2 , -7 is an arithmetic sequence.
The common difference is (20 - 11) = (11 - 2) = (2 - -7) = 9
The common difference is 9.
Answer:
Step-by-step explanation:
-7
4 + (-11)
=> {since, positive x negative = negative}
=> 4 - 11
=> -7
