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Section 2: Limits and Continuity
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Engineering Mathematics I
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Practice Problems for Module 10
Practice Problems for Module 10
Sections 4.2, 4.3, and 4.4
Directions.
The following are review problems. We recommend you work the problems yourself, and then click "Answer" to check your answer. If you do not understand a problem, you can click "Video" to learn how to solve it. You can also follow the link for the full video page to find related videos.
Find the number \(c\) that satisfies the conclusion of the Mean Value Theorem for the function on the interval.
\(f(x)=2x^2-3x+1\), \(\quad [0,2]\).
Answer
\(c=1\)
Video
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MLC WIR 20B M151 week7 #2a
\(f(x)=\ln x\), \(\quad [1,4]\)
Answer
\(c=\dfrac{3}{\ln 4}\)
Video
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MLC WIR 20B M151 week7 #2b
Sketch a curve satisfying the following conditions.
The domain of \(f(x)\) is all real numbers.
\(f(2)=-2\), \(f(0)=0\), \(f(4)=0\), \(f'(2)=0\)
\(f'(x)<0\) if \(0<x<2\), \(f'(x)>0\) if \(x>2\).
\(f''(x)<0\) if \(0\leq x <1\) of if \(x>4\)
\(f''(x)>0\) if \(1<x<4\)
\(\displaystyle \lim_{x\rightarrow \infty} f(x)=2\)
The graph of \(f(x)\) is symmetric about the \(y\)-axis
Answer
See the video
Video
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MLC WIR 20B M151 week7 #3
Find the limit.
\(\displaystyle \lim_{x\rightarrow -2} \frac{x^3+8}{x+2}\)
Answer
\(12\)
Video
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MLC WIR 20B M151 week7 #4a
\(\displaystyle \lim_{x\rightarrow \pi/2} \frac{1-\sin x}{1+\cos 2x}\)
Answer
\(\dfrac{1}{4}\)
Video
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MLC WIR 20B M151 week7 #4b
\(\displaystyle \lim_{x\rightarrow \infty} \frac{\ln \sqrt{x}}{x^2}\)
Answer
\(0\)
Video
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MLC WIR 20B M151 week7 #4c
\(\displaystyle \lim_{x\rightarrow 0} \frac{e^x-1-x}{x^2}\)
Answer
\(\dfrac{1}{2}\)
Video
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MLC WIR 20B M151 week7 #4d
\(\displaystyle \lim_{x\rightarrow \infty} x^3e^{-x^2} \)
Answer
\(0\)
Video
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MLC WIR 20B M151 week7 #4e
\(\displaystyle \lim_{x\rightarrow0^+} \left( \dfrac{1}{x} - \dfrac{1}{e^x-1}\right)\)
Answer
\(\dfrac{1}{2}\)
Video
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MLC WIR 20B M151 week7 #4f
\(\displaystyle \lim_{x\rightarrow 1^+} x^{1/(1-x)}\)
Answer
\(\dfrac{1}{e}\)
Video
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MLC WIR 20B M151 week7 #4g
\(\displaystyle \lim_{x\rightarrow 0^+} (4x+1)^{\cot x}\)
Answer
\(e^4\)
Video
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MLC WIR 20B M151 week7 #4h
Sketch the graph of \(f(x)=\dfrac{x}{x^2-4}\) by locating intervals of increase/decrease, local extrema, concavity, and inflection points.
Answer
See the video
Video
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MLC WIR 20B M151 week7 #5