Write the related series for the finite sequence –7, –10, –13, . ., –22. then find the sum.–7 + (–10) + (–13) + (–16) + (–19) + (–22) = –87 –7 + (–10) + (–13) + (–15) + (–18) + (–22) = –85 –7 + (–10) + (–13) + (–14) + (–18) + (–22) = –84–7 + (–10) + (–13) + (–17) + (–20) + (–22) = –89

Step-by-step explanation:

Given finite sequence : -7, -10, -13, . . ., -22.

Difference between first and second term=

Difference between second and third term =

Hence, the common difference = -3

The next term after -13 =

The next term after -16 =

The next term after -19 =.........which is the last term of the sequence.

Now, the sum of the given sequence =

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