csamayoa1760
27.05.2020 •
Mathematics
What is the sum of the first 17 terms of this arithmetic series? Use .
-28 + (-13) + 2 + 17 + ⋯
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Ответ:
AP: -28 , -13 , 2 , 17 ....
a = -28
d = -13 + 28 = 15
= 17/2 × (-28 × 2 + (17 - 1)15)
= 17/2 × ( - 28 × 2 + 16 × 15 )
= 17 ( - 28 + 120 )
= 17 × 92
= 1564
Ответ:
The cost of the cell phone is a function of the number of features.
Step-by-step explanation:
ape-x