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91Ó°ÊÓ

For each limit statement , use algebra to find δ > 0 in terms of ε> 0 so that if 0 < |x − c| < δ, then | f(x) − L| < ε.

limx→-2(4-2x)=8

Short Answer

Expert verified

δ=ε2

Step by step solution

01

Step1. Given information. 

We have been given a limit statement as limx→-2(4-2x)=8.

We have to find δintermsofε.

02

Step 2. Use algebra 

From the given limit statement, we can identify

f(x)=4−2xc=-2L=8

localid="1648026384344" Forε>0|(4−2x)−8|<ε|4−2x−8|<ε|−2x−4|<ε2|x+2|<ε|x+2|<ε2For0<|x−c|<δ,weget|x+2|<ε2Therefore,δ=ε2

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