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iris [78.8K]
2 years ago
12

Suppose there are n chairs in a row. We want to compute the number of ways to put 2 students into seats so that they are not nex

t to each other. Assume that students are interchangeable: e.g., if n = 3, the solution should be 1, because the only way to accomplish this is to use the first and last chairs. For both parts to this problem, you must explain why your answer is correct: it is not sufficient to compute a few values directly and look for a pattern.
a. Write a recurrence relation describing the number of ways to put the 2 students into seats so that they are not next to each other.
b. Repeat part a, but now suppose the chairs are in a circle (hint: it might help if you label the chairs 1, ... n, even though they are in a circle without a 'start' or 'end').

Engineering
1 answer:
icang [17]2 years ago
8 0

Complete Question

The complete question is shown on the first uploaded image

Answer:

a) f_{(n)} = f_{(n-1)} + n-2

b) g_{(n)} = g_(n+1) + (n-2)

Explanation:

The explanation is shown on the second and third uploaded image

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3 years ago
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Answer:

  F = 2,355 10⁵ N

Explanation:

The pressure is distributed throughout the sphere with the same value and is defined by

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Therefore, on each bolt there is an internal force and external force

      ∑ F = F_int - F_ext

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The area of ​​the sphere layer is

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3 years ago
Which one of these is not a successful budgeting strategy
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Answer:

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Power dissipated in each lamp = I² * r = 0.273² * 1.1 = 0.082W

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