barksdalemc said:The same that I am missing I think. There has to be another summation for that k to exist in the numerator right?
An index of summation question is a mathematical notation used to represent the sum of a series of terms. It is represented by the symbol "∑" followed by the starting value of the index, the ending value of the index, and the expression being summed. For example, ∑(i = 1 to 5) i² represents the sum of the squares of the numbers 1 to 5.
To solve an index of summation question, you must first identify the starting and ending values of the index. Then, substitute each value of the index into the expression being summed and add them all together. For example, to solve ∑(i = 1 to 5) i², you would substitute 1, 2, 3, 4, and 5 into the expression i² and add the results together.
Some common properties of index of summation questions include the ability to manipulate the starting and ending values of the index, the ability to combine multiple indices, and the ability to factor out constants. These properties can help simplify and solve more complex summation questions.
Index of summation questions are used in a variety of fields, including mathematics, physics, and finance. They can be used to calculate the total value of a series of data, such as stock prices, or to solve problems involving sequences and patterns.
One common mistake to avoid when solving index of summation questions is to forget to include the starting and ending values of the index in the calculation. It is also important to properly distribute any constants and to carefully substitute in values for the index. It is always a good idea to double check your work and make sure all steps are clearly shown.