nirajnishad said:i tried but after soving the equations, value of d is coming in fraction.and the common difference cannot be a fraction number
nirajnishad said:i tried but after soving the equations, value of d is coming in fraction.and the common difference cannot be a fraction number
The formula for finding the sum of the first n terms in a series is (n/2)(a + l), where n is the number of terms, a is the first term, and l is the last term.
The first term in a series is typically given or can be calculated using a specific pattern or rule. For example, in an arithmetic series, the first term is the starting number. In a geometric series, the first term is usually given as the initial value or starting value.
The last term in a series can be calculated by using the formula an = a + (n-1)d, where an is the last term, a is the first term, n is the number of terms, and d is the common difference between terms in an arithmetic series. In a geometric series, the last term can be found using the formula an = ar^(n-1), where an is the last term, a is the first term, r is the common ratio between terms, and n is the number of terms.
Yes, you can use a calculator to find the sum of the first 28 terms. Simply plug in the values of the first term, last term, and number of terms into the appropriate formula, and then calculate the result.
Finding the sum of the first 28 terms is important because it allows us to understand the overall pattern and behavior of a series. It can also help us make predictions about future terms in the series and make calculations more efficient by reducing the number of terms we need to work with.