Common difference is when you subtract one term from the one before it
11 then 8
8-11=-3
common difference is -3
second one
3 then -3 then 5 then -1
this is not aritmetic sequence, there is not common differnce here
-2(2-1)^2-15
-2(1)-15
-2-15
-17 is the answer
Answer:
1000000
Step-by-step explanation:
Answer to first one is X = 9
Answer to second one is X = 35
