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enyata [817]
3 years ago
15

A sequence is defined recursively using the formula f(n + 1) = -0.5f(n). If the first term of the sequence is 120, what is f(5)?

Mathematics
2 answers:
Dmitriy789 [7]3 years ago
5 0

Answer:

Third choice

Step-by-step explanation:

i just did it on edgen and got it right

PolarNik [594]3 years ago
3 0

Answer: 7.5

Step-by-step explanation:

The given formula tells us that the next term f(n+1) of the sequence is -0.5 times the previous term f(n)

First term of the sequence is f(1) = 120

Second term of the sequence is f(2) = f(1+1) = -0.5 f(1) = -0.5 (120) = -60

Third term of the sequence is f(3) = f(2+1) = -0.5 f(2) = -0.5 (-60) = 30

Fourth term of the sequence is f(4) = f(3+1) = -0.5 f(3) = -0.5 (30) = -15

Fifth term of the sequence is f(5) = f(4+1) = -0.5 f(4) = -0.5 (-15) = <em>7.5</em>

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Alexus [3.1K]

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Step-by-step explanation:

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Let,

Number of small cars = x

Number of large cars = y

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y = 4x    Eqn 1

which altogether can hold 56 people.

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4x+6y=56 and y=4x can be used to determine the number of small cars rented and the number of large cars rented, where x represents number of small cars and y represents number of large cars.

Keywords: linear equations, addition

Learn more about linear equations at:

  • brainly.com/question/6275033
  • brainly.com/question/6436086

#LearnwithBrainly

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