Question

Write an arithmetic sequence with common difference -5.

Short answer

An arithmetic sequence with common difference -5 is20, 15, 10, 5 …..

Step-by-step solution

Step 1. Given Information.

Given the common difference of an arithmetic sequence is -5.

Step 2. Calculation.

Let the first term be $a_1=20$

The common difference is $d=-5$

So,

The second term of the arithmetic sequence is $20-5=15$

The third term of the arithmetic sequence is $15-5=10$

The fourth term of the arithmetic sequence is $10-5=5$

Step 3. Conclusion.

Hence, the arithmetic sequence with common difference -5 is 20, 15, 10, 5, ….