Exam 4: Definite Integrals

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Find the exact average value of f(x)=sinx+cosxf ( x ) = \sin x + \cos x from x = - π\pi to x = π\pi

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Find k=1nk22k+3n3\sum _ { k = 1 } ^ { n } \frac { k ^ { 2 } - 2 k + 3 } { n ^ { 3 } }

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Find ddx1x2lntdt\frac { d } { d x } \int _ { 1 } ^ { x ^ { 2 } } \ln t d t

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Given f(x)=4x2f ( x ) = 4 - x ^ { 2 } over the interval [0, 4], find: (a) the signed area, (b) the absolute area, between the graph of f and the x-axis from x = 0 to x = 4.

(Short Answer)
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Find the exact average value of f(x)=3+xf ( x ) = 3 + \sqrt { x } from x = 1 to x = 4.

(Short Answer)
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Use geometry to find the exact value of 14(2x2)dx\int _ { - 1 } ^ { 4 } ( 2 - | x - 2 | ) d x

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Find the exact average value of f(x)=x2f ( x ) = x - 2 from x = -1 to x = 3.

(Multiple Choice)
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Find the exact average value of f(x)=(x+1)22f ( x ) = ( x + 1 ) ^ { 2 } - 2 from x = -3 to x = 0.

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Evaluate 14x3dx\int _ { - 1 } ^ { 4 } | x - 3 | d x

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Given f(x)=2x+1f ( x ) = 2 x + 1 , find a number c on the interval (1, 3) such that f(c) is the average value of f on [1, 3].

(Short Answer)
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Write out each sum in expanded form, and then calculate the value of the sum. k=15(3+k)2+1\sum _ { k = 1 } ^ { 5 } ( 3 + k ) ^ { 2 } + 1

(Short Answer)
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Evaluate 143x2xdx\int _ { 1 } ^ { 4 } \frac { 3 \sqrt { x } - 2 } { \sqrt { x } } d x

(Multiple Choice)
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Approximate the area between the graph of f(x)=x+1f ( x ) = \sqrt { x + 1 } and the x-axis on the interval [1, 3], for n = 4, using (a) left sums (b) right sums.

(Essay)
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Use definite integrals and Fundamental Theorem of Calculus to find the exact area of the region between the graphs of f(x)=x2f ( x ) = x ^ { 2 } and g(x)=x+6g ( x ) = x + 6 from x = -3 to x = 0.

(Multiple Choice)
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Given f(x)=16x2f ( x ) = 16 - x ^ { 2 } , find a number c on the interval (0, 4) such that f(c) is the average value of f on [0, 4].

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Given f(x)=4xf ( x ) = 4 - x over the interval [1, 6], find: (a) the signed area, (b) the absolute area, between the graph of f and the x-axis from x = 1 to x = 6.

(Short Answer)
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Evaluate 02(x22)2dx\int _ { 0 } ^ { 2 } \left( x ^ { 2 } - 2 \right) ^ { 2 } d x

(Multiple Choice)
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Approximate the area between the graph of f(x)=(x2)2+1f ( x ) = ( x - 2 ) ^ { 2 } + 1 and the x-axis on the interval [1, 5], using a left sum with (a) n = 2, (b) n = 4.

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Given f(x)=3+xf ( x ) = 3 + \sqrt { x } , find a number c on the interval (1, 4) such that f(c) is the average value of f on [1, 4].

(Short Answer)
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Write the following sum in sigma notation.11 + 18 + 27 + 38 + 51 + 66

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