Find the sum of a finite arithmetic sequence from n = 1 to n = 10, using the expression 3n − 8.
1 answer:
Answer:
The answer is 85
Step-by-step explanation:
The equation used to find the sum of an arithmetic series is: (n/2) * (a1 + an).
n in this case is 10 (the number of numbers in the series)
an is 22 (plug in 10 to the expression 3n-8)
and a1 is -5 (plug in 1 to the expression 3n-8)
so when you plug everything in to the final equation, you get
(10/2) * (-5 + 22)
5 * 17
85
You might be interested in
You need to learn no to copy it kiddo
Answer:
1/4
2 x 1/8 is also 1/8 + 1/8 and that is then 2/8 and after that when you simplify you get 1/4.
Answer:
300!! I think...
Step-by-step explanation:
30 x 10 = 300
The answer to this question mark will do it all in a few weeks to make it happen again this week at the end
I solved it on your other posting of it. x = 12
All of the steps are there
