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Summation Notation
The sum of the first terms of a sequence, whose th term is denoted as , can be written compactly using summation notation: . In this expression, represents the index of summation, the lower limit indicates where to start, and the upper limit indicates where to end the sum.
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Intermediate Algebra @ OpenStax
Algebra
Related
Infinite Sequence
Finite Sequence
General Term of a Sequence
Arithmetic Sequence
Geometric Sequence
Annuity
Partial Sum
Summation Notation
Factorial Notation
As an inventory analyst, you record the total number of items restocked at the end of each week. You list the totals so that the first week corresponds to position 1, the second week to position 2, and so on. In algebraic terms, this ordered list of values—which can be thought of as a mathematical relationship whose domain is restricted to the counting numbers ()—is formally defined as a:
In a workplace productivity report, a supervisor lists the number of units produced in each consecutive hour of a shift. Algebraically, this ordered list represents a sequence. True or False: An algebraic sequence is formally defined as a function whose domain is restricted to the set of counting numbers ().
A customer service lead tracks the number of calls answered during each hour of an 8-hour shift. Match each algebraic component of this data record with its practical description.
Identifying Components of Sequential Data
A supervisor at a manufacturing plant maintains a production log that lists the number of units completed during each consecutive hour of a shift. This ordered list of data (e.g., ) represents an algebraic sequence. In this context, each individual numerical value in the list is formally referred to as a(n) ____.
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As a logistics coordinator, you are tracking the daily mileage of a delivery fleet. The total mileage for a 5-day work week is written using summation notation as , where represents the miles driven on day . Based on the standard definitions of summation notation, what is the specific mathematical term for the variable in this expression?
A project manager is totaling the daily expenses for a one-week project using the summation notation , where represents the expense on day . Match each part of this mathematical expression to its correct name.
A quality control technician is totaling the number of defects found in three production batches using the notation , where represents the defects in batch . True or False: The expanded form of this summation is .
Interpreting Shipping Logistics Notation
Purpose of Summation Limits