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

### Essential Calculus: Early Transcen...

2nd Edition
James Stewart
Publisher: Cengage Learning
ISBN: 9781133112280

### Essential Calculus: Early Transcen...

2nd Edition
James Stewart
Publisher: Cengage Learning
ISBN: 9781133112280

#### Solutions

Chapter B, Problem 1E
To determine

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

Expert Solution

The sum i=15i in expanded form 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:

The given summation is i=15i.

By using the above mentioned definition, write the sum i=15i in expanded form as follows.

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

Therefore, the sum i=15i in expanded form is 1+2+3+4+5_.

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