Question

Asked Jan 13, 2020

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Find the sum of the ﬁrst 80 positive even intergers.

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Step 1

Sum of the arithmetic progression with for n terms where a_{1} is the first term and a_{n} is the last term.

Step 2

Here, series will have:

n=80 ( there are 80 terms)

a_{1}=2 ( first positive even integer)

80^{th} positive integer must be 160. So,

a_{n}=160

Step 3

Calculate s...

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