Question

Evaluate the following and give reasons for your answer.

$\frac{1}{4.10} + \frac{1}{10.16} + \frac{1}{16.22} + \frac{1}{22.28} + \frac{1}{28.34}$
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Answer 1

1/4.10 , 1/10.16____1/28.34

common difference = 1/ 6.06

it is an arithmetic sequence

S = n/2 ( initial term + final term)

= 6/2 ( 1/ 4.10 + 1/ 28.34)

= 3 / 32.44

= 0.092