FIGURE 17 128 3 /3 bortio 9 r gola aed O For another method see Exercise 64. 6.2 EXERCISES 15. y x 1-18 Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified line. Sketch the region, the solid, and a typical disk or washer. 16. xy = 1, 17. x = y' 1. y x+ 1, y = 0, x = 0, x = 2; about the x-axis 18. y x, 2. y 1/x, y = 0, x = 1, x = 4; about the x-axis 3. y x1, y = 0, x= 5; about the x-axis 19-30 Refe e, y= 0, x = -1, x = 1; about the x-axis 4. y rotating the 5. x 2y, x = 0, y 9; about the y-axis 0: 6. 2x y, x = 0, y 4; about the y-axis 7. y x, y= x, x > 0; about the x-axis 6 x, y = 2; about the x-axis 8. y x, x = 2y; about the y-axis 9. y 10. x 2 y, x= y; about the y-axis 11. y x, x= y; about y = 1 1, x = 2; about y -3 12. y x, y 19. R1 ab 13. y 1sec x, y 3; about y 1 21. Ri ab 14. y sin x, y = cos x, 0 < xTT/4; about y = -1
Unitary Method
The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products.
Speed, Time, and Distance
Imagine you and 3 of your friends are planning to go to the playground at 6 in the evening. Your house is one mile away from the playground and one of your friends named Jim must start at 5 pm to reach the playground by walk. The other two friends are 3 miles away.
Profit and Loss
The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.
Units and Measurements
Measurements and comparisons are the foundation of science and engineering. We, therefore, need rules that tell us how things are measured and compared. For these measurements and comparisons, we perform certain experiments, and we will need the experiments to set up the devices.
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