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In this lesson, we will learn how to calculate the common difference, find next terms in an arithmetic sequence, and check if the sequence increases or decreases.

Q1:

Write the next three terms of the arithmetic sequence 1 5 . 8 , 1 4 . 6 , 1 3 . 4 , 1 2 . 2 , … .

Q2:

Write the next three terms of the arithmetic sequence 1 8 . 5 , 1 7 . 9 , 1 7 . 3 , 1 6 . 7 , … .

Q3:

Consider the finite sequence { 2 0 , 1 4 , 8 , 2 , − 4 , , , − 2 2 } , where two values are missing. We can think of this sequence as the function whose graph is sketched.

What is the domain of the function?

What is the range of the function?

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