Question

which of the sequences from a G. P? 7,14,21,28.......​

Answer 1

Answer:

It's a table of 7....

7,14,21,28,35,42,49,56,63,70.......

Answer 2

The arithmetic sequence appears to be consecutive multiples of 7, with alternating signs.

The formula for the multiples of 7 is 7n, for the nth term of the sequence. This piece produces 7, 14, 21, 28, 35, …

The formula for applying the alternating signs is (-1)^(n-1), for the nth term of the sequence. This piece produces 1, -1, 1, -1, 1, …

Therefore, the formula for the nth term of the sequence can be expressed as

7n*(-1)^(n-1).