Math geniuses part 3
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Math geniuses part 3

[From: ] [author: ] [Date: 11-10-20] [Hit: ]
.etc..i need a general term to determine the total number of flowers you need to plant n rows of flowers?= 1.= 1.......
write a general term to find the number of flowers in the nth row when the first row has 42 flowers, 2nd has 40 flowers the 3rd has 38 flowers..etc..i need a general term to determine the total number of flowers you need to plant n rows of flowers?

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What your looking for is the arithmetic series

Formula for arithmetic series is
S(n) = (n/2) * (42 + (-2n + 44))

Now to test:
S(3) = (3/2) * (42 + (-2(3) + 44))
= 1.5 * (42 + 38)
= 1.5 * (80) = 120
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