Now, use direct substitution. 1 lim X-2 x + 7 + 3) = 1/6 Thus, the value of the limit X + 7 lim X - 2 is equal to

College Algebra
1st Edition
ISBN:9781938168383
Author:Jay Abramson
Publisher:Jay Abramson
Chapter3: Functions
Section3.3: Rates Of Change And Behavior Of Graphs
Problem 2SE: If a functionfis increasing on (a,b) and decreasing on (b,c) , then what can be said about the local...
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Evaluate the limit using techniques from Chapters 1 and 3 and using L'Hôpital's Rule.
Vx + 7 - 3
lim
x- 2
x - 2
Exercise (a)
(a) Using techniques from Chapters 1 and 3
Step 1
x + 7 - 3
The limit to be evaluated is
lim
X - 2
By directly substituting we have the following.
x + 7
lim
X - 2
Thus, the direct substitution results in indeterminate
indeterminate form.
Step 2
To evaluate the limit, rewrite the limit by rationalizing the numerator.
Vx + 7 - 3
lim
7 +
x + 7 - 3
x + 7
= lim
X- 2
x- 2
X - 2
X - 2
Vx + 7 + 3
Transcribed Image Text:Evaluate the limit using techniques from Chapters 1 and 3 and using L'Hôpital's Rule. Vx + 7 - 3 lim x- 2 x - 2 Exercise (a) (a) Using techniques from Chapters 1 and 3 Step 1 x + 7 - 3 The limit to be evaluated is lim X - 2 By directly substituting we have the following. x + 7 lim X - 2 Thus, the direct substitution results in indeterminate indeterminate form. Step 2 To evaluate the limit, rewrite the limit by rationalizing the numerator. Vx + 7 - 3 lim 7 + x + 7 - 3 x + 7 = lim X- 2 x- 2 X - 2 X - 2 Vx + 7 + 3
Step 2
To evaluate the limit, rewrite the limit by rationalizing the numerator.
x + 7
lim
3
+ 3
lim
·2
Vx + 7 + 3
= lim
X- 2
(x - 2
Vx + 7 +
1
= lim
x + 7 + 3
Step 3
Now, use direct substitution.
lim
= 1/6
/x + 7 + 3
Thus, the value of the limit
x + 7 - 3
lim
X- 2
X - 2
is equal to
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Transcribed Image Text:Step 2 To evaluate the limit, rewrite the limit by rationalizing the numerator. x + 7 lim 3 + 3 lim ·2 Vx + 7 + 3 = lim X- 2 (x - 2 Vx + 7 + 1 = lim x + 7 + 3 Step 3 Now, use direct substitution. lim = 1/6 /x + 7 + 3 Thus, the value of the limit x + 7 - 3 lim X- 2 X - 2 is equal to Submit Skip (you cannot come back)
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