Question

Which expression defies the arithmetic series 10 + 7 + 4 ... for six terms?

Answer 1

`a_n = 10-3(n - 1)`

10 + 7 + 4 + 1 + -2 + -5

Explanation:

Explicit Arithmetic Formula:
`a_n = a_1 + d(n-1)`

To find d, take the common difference between 2 numbers.

To find the other terms of the sequence, plug them into the explicit formula or subtract 3 from the given numbers.