# The sum ∑ i = 1 5 i is in expanded form.

### Single Variable Calculus: Concepts...

4th Edition
James Stewart
Publisher: Cengage Learning
ISBN: 9781337687805

### Single Variable Calculus: Concepts...

4th Edition
James Stewart
Publisher: Cengage Learning
ISBN: 9781337687805

#### Solutions

Chapter F, Problem 1E
To determine

## To write: The sum ∑i=15i is in expanded form.

Expert Solution

The expanded form of the sum i=15i is 1+2+3+4+5.

### Explanation of Solution

Definition used:

If am,am+1,...,an are real numbers and m and n are integers such that mn, then i=mnai=am+am+1+am+2++an1+an.

Calculation:

By the above definition, the expression i=15i simplified as follows.

i=15i=1+2+3+4+5

Thus, the expanded form of the sum i=15i is 1+2+3+4+5.

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