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icemaniac
07.10.2019 •
Mathematics
⦁find the sum of the series . 15 sigma n=1, (2n-1) show your work
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Ответ:
225
Step-by-step explanation:
The sum of this series is given by the formula:
Where
S_n is the sum
a is the first term (we get this by plugging in n = 1 into "2n-1", we have 2(1) - 1 = 1)
n is the number of terms (the sum is defined for n = 1 to n = 15, so 15 terms)
d is the common different (the difference is successive terms. Here, 2nd term would be 2(2) - 1 = 3, and first term was 1, so d = 3 -1 = 2)
plugging in the info, we will get the sum:
The sum is 225
Ответ:
Sin angle B = X/Z
= 18/ 82
=9/41
2) Cosine = adj/hyp
Cos angle B = Y/Z
=8/10
=4/5
3) Tangent = Opp/Adj
Tan angle B = X/Y
=10/24
=5/12
Hyp = hypotenuse
Adj = adjacent
Opp = opposite