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Consider the following recursive algorithm.ALGORITHM Q(n)//Input: A positive integer nif n = 1 return 1else return Q(n − 1) + 2 ∗ n − 1a. Set up a recurrence relation for this function’s values and solve it to deter-mine what this algorithm computes.b. Set up a recurrence relation for the number of multiplications made by thisalgorithm and solve it.c. Set up a recurrence relation for the number of additions/subtractions madeby this algorithm and solve it.

Question

Consider the following recursive algorithm.ALGORITHM Q(n)//Input: A positive integer nif n = 1 return 1else return Q(n − 1) + 2 ∗ n − 1a. Set up a recurrence relation for this function’s values and solve it to deter-mine what this algorithm computes.b. Set up a recurrence relation for the number of multiplications made by thisalgorithm and solve it.c. Set up a recurrence relation for the number of additions/subtractions madeby this algorithm and solve it.

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Solution

a. The recurrence relation for the function's values is:

Q(n) = Q(n-1) + 2n - 1, for n > 1 Q(1) = 1

To solve this recurrence relation, we can expand it:

Q(n) = Q(n-1) + 2n - 1 = Q(n-2) + 2(n-1) - 1 +

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