The sequence in the question is NOT an arithmetic sequence. In an arithmetic sequence the difference between each term and its predecessor (the term immediately before) is a constant - including the sign. It is not enough for the difference between two successive terms (in any order) to remain constant. In the above sequence, the difference is -7 for the first two intervals and then changes to +7.
18 - 6n
12, 6, 0, -6, ...
It appears to be -6
8 + 4n
The sequence 216 12 23 is neither arithmetic nor geometric.
18 - 6n
12, 6, 0, -6, ...
It appears to be -6
8 + 4n
The sequence 216 12 23 is neither arithmetic nor geometric.
It is neither.
Give the simple formula for the nth term of the following arithmetic sequence. Your answer will be of the form an + b.12, 16, 20, 24, 28, ...
7
It is -148.
No, geometric, common ratio 2
This is not a geometric series since -18/54 is not the same as -36/12
No it is not.U(2) - U(1) = 6 - 2 = 4U(3) - U(2) = 18 - 6 = 12Since 4 is different from 12, it is not an arithmetic sequence.