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Pre-Calc Homework Solutions 81

# Pre-Calc Homework Solutions 81 - Section 3.4 3 When the...

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3. When the trace cursor is moving upward the particle is moving to the right, and when the cursor is moving downward the particle is moving to the left. Again we find the same values of t for when the particle reverses direction. 4. We can represent the velocity by graphing the parametric equations x 4 ( t ) 5 x 1 9 ( t ) 5 12 t 2 2 32 t 1 15, y 4 ( t ) 5 2 (part 1), x 5 ( t ) 5 x 1 9 ( t ) 5 12 t 2 2 32 t 1 15, y 5 ( t ) 5 t (part 2), x 6 ( t ) 5 t , y 6 ( t ) 5 x 1 9 ( t ) 5 12 t 2 2 32 t 1 15 (part 3) [ 2 8, 20] by [ 2 3, 5] ( x 4 , y 4 ) [ 2 8, 20] by [ 2 3, 5] ( x 5 , y 5 ) [ 2 2, 5] by [ 2 10, 20] ( x 6 , y 6 ) For ( x 4 , y 4 ) and ( x 5 , y 5 ), the particle is moving to the right when the x -coordinate of the graph (velocity) is positive, moving to the left when the x -coordinate of the graph (velocity) is negative, and is stopped when the x -coordinate of the graph (velocity) is 0. For ( x 6 , y 6 ), the particle is moving to the right when the y -coordinate of the graph (velocity) is positive, moving to the left when the y -coordinate of the graph (velocity) is negative, and is stopped when the y -coordinate of the graph (velocity) is 0.
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