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Rufina [12.5K]
3 years ago
15

Write the formula for the following sequence.5.8, 3.6, 1.4,...PLEASE SHOW YOUR WORK.​

Mathematics
1 answer:
sladkih [1.3K]3 years ago
3 0

tn = t(n - 1)- 2.2

common difference is

3.6 - 5.8 = -2.2

let T1 = 5.8

T2 = 3.6

assuming we are to find T2

T2 = T(2-1) -2.2

= T1 -22

= 5.8 -2.2

= 3.6

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Option D.

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M = \frac{(x_1 + x_2 + x_3 ... + x_n)}{N}

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We subtract 7 to all values smaller than the median.

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The new mean will be:

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Because the mean is computed as the sum of the numbers divided by N, and the mean does not change, and N does not change, then the sum of the numbers does not change.

Finally, the standard deviation is computed as:

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Because M does not change, if we add or subtract numbers to some of the values, the standard deviation will change (Because all the terms are squared, so the added and subtracted sevens don't cancel like in the previous cases)

Then the only value that does not have the same value in both the original and new data sets is the standard deviation.

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