Pre-Calc Homework Solutions 293

The vertical edges alone have lengths 2k that

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Unformatted text preview: ut bound, so the perimeters are tending to infinity. 0. For x, use vertical strips: 35. By symmetry, y x dm Quick Review 7.2 x dA dA x dA x dm 2 0 1. dA 0 1 sin x dx 1 2x e 2 cos x 0 1 0 [ 1 1] 2 x(2x) dx 2 0 2. 0 e2x dx /4 1 2 (e 2 1) 3.195 2x dx 3. 2 sec2 x dx tan x /4 /4 1 2 ( 1) 2 /4 2 3 2 x 3 0 x2 4 3 2 0 4. 0 3 (4x x 3) dx x 2 dx 2x 2 1 4 x 4 (8 0 4) 0 4 5. 3 9 radius 3.) 9 (This is half the area of a circle of 2...
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