Z increases at rate of 10 units/s Z decreases at rate of 10 units/s

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Presentation transcript:

Z increases at rate of 10 units/s Z decreases at rate of 10 units/s Example: All variables are function of time t, then differentiate with respect to t. Z increases at rate of 10 units/s means that Z decreases at rate of 10 units/s means that

Related Rate problems: The idea is to compute the rate of change of one quantity in terms of the rate of change of another quantity Example: Given dx/dt Find dz/dt

Example:082/E2 STRATEGY 1. Read the problem carefully. 2. Draw a diagram if possible. 3. Introduce notation. Assign symbols to all quantities that are functions of time. 4. Express the given information and the required rate in terms of derivatives. 5. Write an equation that relates the various quantities of the problem. If necessary, use the geometry of the situation to eliminate one of the variables by substitution 6. Use the Chain Rule to differentiate both sides of the equation with respect to . 7. Substitute the given information into the resulting equation and solve for the unknown rate.

Example:091/E2 STRATEGY 1. Read the problem carefully. 2. Draw a diagram if possible. 3. Introduce notation. Assign symbols to all quantities that are functions of time. 4. Express the given information and the required rate in terms of derivatives. 5. Write an equation that relates the various quantities of the problem. If necessary, use the geometry of the situation to eliminate one of the variables by substitution 6. Use the Chain Rule to differentiate both sides of the equation with respect to . 7. Substitute the given information into the resulting equation and solve for the unknown rate.

Example:093/E2 STRATEGY 1. Read the problem carefully. 2. Draw a diagram if possible. 3. Introduce notation. Assign symbols to all quantities that are functions of time. 4. Express the given information and the required rate in terms of derivatives. 5. Write an equation that relates the various quantities of the problem. If necessary, use the geometry of the situation to eliminate one of the variables by substitution 6. Use the Chain Rule to differentiate both sides of the equation with respect to . 7. Substitute the given information into the resulting equation and solve for the unknown rate.

Example:093/E2 STRATEGY 1. Read the problem carefully. 2. Draw a diagram if possible. 3. Introduce notation. Assign symbols to all quantities that are functions of time. 4. Express the given information and the required rate in terms of derivatives. 5. Write an equation that relates the various quantities of the problem. If necessary, use the geometry of the situation to eliminate one of the variables by substitution 6. Use the Chain Rule to differentiate both sides of the equation with respect to . 7. Substitute the given information into the resulting equation and solve for the unknown rate.

Example:081/E2 STRATEGY 1. Read the problem carefully. 2. Draw a diagram if possible. 3. Introduce notation. Assign symbols to all quantities that are functions of time. 4. Express the given information and the required rate in terms of derivatives. 5. Write an equation that relates the various quantities of the problem. If necessary, use the geometry of the situation to eliminate one of the variables by substitution 6. Use the Chain Rule to differentiate both sides of the equation with respect to . 7. Substitute the given information into the resulting equation and solve for the unknown rate. Solution: http://faculty.kfupm.edu.sa/math/ffairag/math101_102/notes/3p9sol.pdf