Exercise 1.9

Exercise 1.9 is a problem that asks you to find the sum of a sequence of numbers. The specific problem may vary depending on the textbook or curriculum you are using, but the general concept remains the same.

To solve Exercise 1.9, you will need to determine the sum of a given sequence of numbers. This usually involves adding up all the numbers in the sequence.

Here is an example of how you might approach Exercise 1.9:

1. Read the problem carefully and identify the sequence of numbers you need to work with.
2. Write down the numbers in the sequence. For example, if the sequence is 2, 4, 6, 8, 10, you would write: 2, 4, 6, 8, 10.
3. Add up all the numbers in the sequence. In this example, you would calculate: 2 + 4 + 6 + 8 + 10 = 30.
4. Write down the final sum of the sequence. In this example, the sum is 30.

Remember to always double-check your work and make sure you didn't miss any numbers in the sequence or make any calculation errors.

It's important to practice similar exercises to improve your mathematical skills and understanding. The more you practice, the more comfortable you will become with summing sequences of numbers.