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AnnZ [28]
3 years ago
13

Arithmetic Sequences Continued

Mathematics
1 answer:
Angelina_Jolie [31]3 years ago
5 0

Answer:

The common difference is 4

5, 9, 13, 17

Step-by-step explanation:

Given

5, _, _, 17

Solving (a): The common difference

Since it is an arithmetic sequence, the common difference can be solved using:

T_n = a + (n - 1)d

Where

a = 5

T_n = 17

n = 4 i.e. 4 terms

So:

T_n = a + (n - 1)d

17 = 5 +(4 - 1) * d

17 = 5 +3d

Collect like terms

3d = 17 - 5

3d = 12

d  =4

<em>Hence, the common difference is 4</em>

Solving (b): Complete the blanks.

To do this, we simply add 4 to each successive terms.

So: 5, 9, 13, 17

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