angelinararr5783
02.04.2020 •
Mathematics
A company wishes to buy 3 filing cabinets for
$69.75 each and 2 chairs for $49.99 each.
a. Find the actual total cost of the furniture.
b. Find the estimated total cost of the
furniture. Is the estimated cost close
to the actual cost?
Solved
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Ответ:
–2, 4, –8, 16, –32, ...
Step-by-step explanation:
aₙ = (-2)ⁿ
a₁ = (-2)¹ = -2
a₂ = (-2)² = 4
a₃ = (-2)³ = -8
a₄ = (-2)⁴ = 16
a₅ = (-2)⁵ = -32
Each term has a factor of (-1)ⁿ. Thus, odd-numbered terms are negative, and even-numbered terms are positive
The series is –2, 4, –8, 16, –32, ...