The recursive function would work like this: the n-th odd number is 2n-1. With each iteration, we return the sum of 2n-1 and the sum of the first n-1 odd numbers. The break case is when we have the sum of the first odd number, which is 1, and we return 1.
int recursiveOddSum(int n) {
if(2n-1==1) return 1;
return (2n-1) + recursiveOddSum(n-1);
}
To prove the correctness of this algorithm by induction, we start from the base case as usual:
by definition of the break case, and 1 is indeed the sum of the first odd number (it is a degenerate sum of only one term).
Now we can assume that 
returns indeed the sum of the first n-1 odd numbers, and we have to proof that 
returns the sum of the first n odd numbers. By the recursive logic, we have
and by induction, is the sum of the first n-1 odd numbers, and 2n-1 is the n-th odd number. So, is the sum of the first n odd numbers, as required:
The object-oriented analysis method of developing systems produces code that is modular and reusable.
<h3>What is object oriented system analysis?</h3>
Object-oriented systems analysis and specification (OSA) is known to be a kind of a method that is often used in regards to systems analysis and this is known to be one that helps to create or builds on the strengths of former systems and, at also at the same time, look into their weaknesses.
Note that this is said to be the basic idea behind the OSA methodology that are known to be described. The framework of OSA system models is known to be object class.
Hence, The object-oriented analysis method of developing systems produces code that is modular and reusable.
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The type of the client subscription used is paid subscription.
<h3>What is Paid Subscription? </h3>
Paid Subscription refers to the payment made already on the product purchased or the services received. It is a kind of the recurring payment whose transactions repeat after a regular basis.
If the customer continue to receive the service then he or she has to pay the subscription.
After paying the membership costs, customers of Quickbooks Online for accountancy firms can access the Quickbooks Online Advanced desktop application.
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Answer: Copy the files from the NAS to an S3 bucket with the One Zone-IA class
Explanation:
Th one Zone -IA class with S3 bucket has reduced cost but offers the same durability for which the files needs to be copied from NAS to access them faster.
Answer:
The answer is D. <em>os.path.exists(filename)</em>
Explanation:
