Trying to understand the question: Find dy/dx

  • Thread starter ugeous
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In summary, "dy/dx" is a mathematical notation used to represent the derivative of a function, which measures how one variable changes with respect to another variable in an equation. To find dy/dx, you can use the rules of differentiation, which tell you how to take the derivative of different types of functions. Finding dy/dx is important in understanding the rate of change of a function and solving optimization problems. While calculators can be used to find dy/dx, it is important to have a conceptual understanding of differentiation. Additionally, dy/dx represents the instantaneous rate of change, while Δy/Δx represents the average rate of change over a given interval.
  • #1
ugeous
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Hello!

Question asks: Find dy/dx. Do not simplify.

y = sec(cube root x)

My answer is

dy/dx = sec(cube root x) * tan(cube root x)

Am I correct?

thanks!
 
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  • #2
Hello ugeous. You are VERY close. Remember the chain rule? Our inside angle for sec in y = sec (cube root x) is cube root x. you must take the derivative of this "inside angle" to complete the problem correctly.
 
  • #3
Oh, right!

sec(cube root x) * tan(cube root x) * 1/3(x^-2/3)

Is this correct?
 
  • #4
You bet you :)
 
  • #5
Thanks man!
 

1. What does "dy/dx" mean?

"dy/dx" is a mathematical notation used to represent the derivative of a function. It is read as "the derivative of y with respect to x." Essentially, it is a way to express how one variable (y) changes with respect to another variable (x) in a given equation.

2. How do I find dy/dx?

To find dy/dx, you will need to use the rules of differentiation, also known as the derivative rules. These rules tell you how to take the derivative of different types of functions, such as polynomials, trigonometric functions, and exponential functions. By applying these rules to the given function, you can find the derivative and therefore, dy/dx.

3. Why is finding dy/dx important?

Finding dy/dx is important because it allows us to understand the rate of change of a function. This is useful in many fields such as physics, economics, and engineering, where we need to know how one variable affects another. It also helps us find the slope of a tangent line at a specific point on a curve, which can be used to solve optimization problems.

4. Can I use a calculator to find dy/dx?

Yes, there are many calculators and software programs that can find the derivative of a function and therefore, dy/dx. However, it is important to understand the concepts and rules behind differentiation in order to use these tools effectively and accurately.

5. What is the difference between dy/dx and Δy/Δx?

While dy/dx represents the derivative of a function at a specific point, Δy/Δx represents the average rate of change of a function over a given interval. In other words, dy/dx gives us the instantaneous rate of change, while Δy/Δx gives us the average rate of change. As the interval becomes smaller, the average rate of change approaches the instantaneous rate of change represented by dy/dx.

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