   Chapter 3.4, Problem 27E

Chapter
Section
Textbook Problem

# 9-32 Find the limit or show that it does not exist. lim x →   − ∞ ( x 2 + 2 x 7 )

To determine

To find:

lim - ∞(x2+2x7)

Explanation

1) Concept:

Use the definition of infinite limit at infinity, find the limit.

2) Infinite limits at Infinity:

limxf(x)= indicate that the value of f(x) become large as x becomes large. Similar meaning applied to

limx-f(x)=

limx-f(x)=-

limxf(x)=-

3) Given:

lim - ∞(x2+2x7)

4) Calculation:

By taking x7 common

lim -(x2+2x7)= lim

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