   Chapter 13.1, Problem 14E ### 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. ∑ k = 1 3 x k ,  if   x 1 = 1 ,   x 2 = 3 ,   x 3 = − 1 ,   x 4 = 5

To determine

To calculate: The value of the sum k=13xk where x1=1, x2=3, x3=1 and x4=5.

Explanation

Given Information:

The provided values are as follows,

x1=1, x2=3, x3=1 and x4=5

Formula used:

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

k=1nxk=x1+x2++xn

Calculation:

Consider the sum k=13xk.

Recall the value of the sum k=1nxk=x1+x2++xn.

Compare k=13xk and k=1nxk.

Thus, n=3.

Substitute 3 for n in k=1nxk=x1+x2++xn

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