Question

Find the first 4 terms of the sequence defined by the explicit rule f(n)= 7(n − 1) - 10. Is it an arithmeticsequence? Complete the explanation.

Answer 1

Answer:

Each term is increasing by a common difference of 7

Explanation:

Given that the first four terms of a sequence are:

-10, -3, 4 , 11

The common difference of a sequence is the difference between a term and it's preceeding term.

-3 - (-10) = 7

or

4 - (-3) = 7

or

11 - 4 = 7