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# What is the common difference between successive terms in the sequence?

9, 2.5, -4, -10.5, -17, …

**Solution:**

The given sequence is 9 , 2.5, -4 , -10.5, -17 ,...

So, common difference

d = a_{1} - a_{2}

d = 2.5 - 9

⇒ d = -6.5

⇒ d = - 4 - 2.5 = -6.5

⇒ d = - 10.5 - (-4) = -6.5

⇒ d = -17 - (-10.5) = -6.5

Therefore, the common difference is d = -6.5

## What is the common difference between successive terms in the sequence?

9, 2.5, -4, -10.5, -17, …

**Summary:**

The common difference between successive terms in the sequence 9, 2.5, -4, -10.5, -17, … is d = -6.5

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