Question

find the sum of 10+1+8+2+6+3+...+10(-10) series

Answer 1

Method 3 Finding the Nth Term of an Arithmetic Sequence

Identify the first term of the sequence. Not every sequence begins with the numbers 0 or 1. ...

Define your common difference as d. Find the common difference for the sequence as before. ...

Use the explicit formula. ...

Fill in your information to solve the problem.

Answer 2

Hii buddy

ur answer is

• Time Complexity: O(n)

• Please refer below post for O(1) solution.
• Sum of squares of first n natural numbers

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hope it will help you mate