   Chapter 13.1, Problem 15E ### Mathematical Applications for the ...

11th Edition
Ronald J. Harshbarger + 1 other
ISBN: 9781305108042

#### Solutions

Chapter
Section ### Mathematical Applications for the ...

11th Edition
Ronald J. Harshbarger + 1 other
ISBN: 9781305108042
Textbook Problem

# In Problems 14-19, find the value of each sum. ∑ i = 1 4 x i ,  if   x 1 = 3 ,   x 2 = − 1 ,   x 3 = 3 ,   x 4 = − 2

To determine

To calculate: The value of the sum i=14xi where x1=3, x2=1, x3=3 and x4=2.

Explanation

Given Information:

The provided values are as follows,

x1=3, x2=1, x3=3 and x4=2

Formula used:

The sum of n numbers x1, x2, x3,,xn is given by

i=1nxi=x1+x2++xn

Calculation:

Consider the sum i=14xi.

Recall the value of the sum i=1nxi=x1+x2++xn.

Compare i=14xi and i=1nxi.

Thus, n=4.

Substitute 4 for n in i=1nxi=x1+x2++xn

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