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Q.
- Evaluate expression for : The series is a finite arithmetic series with two terms, and . We will evaluate the expression for each value of and then sum the results.
- Evaluate expression for : First, we substitute into the expression to get the first term of the series. This gives us , which equals .
- Sum the terms of the series: Next, we substitute into the expression to get the second term of the series. This gives us , which equals .
- Sum the terms of the series: Next, we substitute into the expression to get the second term of the series. This gives us , which equals . Now, we add the two terms of the series together. The sum is (from ) plus (from ), which equals .
