An arithmetic sequence has a first term of 10 and a common difference of 4.
1 answer:
The sum of 18 terms is 792.
<h3>What is an Arithmetic Sequence ?</h3>An arithmetic sequence is defined as the sequence of numbers in which the difference between two consecutive terms is same.
First Term is 10
Common Difference = 4
The partial sum of the arithmetic sequence is given by
Here a is the first term , d is the common difference
Therefore the sum of 18 terms is 792.
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Answer:
The other rational number in the operation given is:
- <u>6/5</u>
Step-by-step explanation:
To obtain the number in the operation given, we're gonna represent the operation:
- r * 15/14 = 9/7
Where:
- r = the other rational number.
Now we are going to solve r to identify its value in numbers:
- r * 15/14 = 9/7
(We pass a number that is multiplying to the left of the equal, to divide to the right of the equal symbol)
As you can see, when we operate, <u>the result is 6/5</u>, and we can prove this multiplying as we had in the original equation, replacing r by 6/5:
- r * 15/14 = 9/7
- 6/5 * 15/14 = 9/7
- 9/7 = 9/7
In this form, we know the result is correct.