Answer:
f(n) = 18 + 4n
Step-by-step explanation:
= 22 + 4(n-1)
= 22 + 4n - 4
= 18 + 4n
The formula used for the arithematic sequence will be f(n) = 18 + 4n
An arithmetic sequence is a series of numbers in which the difference between the next term to its previous term remains constant for the whole series. This difference is called a common difference.
Given that:-
A theater has 18 rows of seats. There are 22 seats in the first row, 26 seats in the second row, 30 seats in the third row, and so on
The formula will be given as follows:-
f(n)= 22 + 4(n-1)
f(n)= 22 + 4n - 4
f(n)= 18 + 4n
Therefore the formula used for the arithmetic sequence will be f(n) = 18 + 4n
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