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Math Help-please help?
what is the mean (average) of the first 300 terms in the following sequence
1, -2, 3, -4, 5, -6, 7, .......
thank you
show your work and will receive the best ANSWER!@
1 Answer
- Anonymous1 decade agoFavorite Answer
Group the terms in pairs:
(1 - 2) + (3 - 4) + ... + (299 - 300).
There are 300 / 2 = 150 pairs, and the sum of each individual pair is - 1.
The total to 300 terms is therefore:
150 * (- 1) = - 150
Dividing by the number of terms (300) gives the mean:
- 150 / 300
= - 1 / 2.