Algebra-1

To find the explicit formula for the sequence 30,25,20,15,…, follow these steps:

Determine the common difference d:

The sequence decreases by 5 each time (e.g., 25−30=−5, 20−25=−5).

Use the formula for the n-th term of an arithmetic sequence:

= + (n − 1)d

Where 

Click "Show Answer" to reveal the answer and analysis