Math Problem Statement

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Solution

To solve this, I will extract the function from the image and compute the derivative.

The function appears to be:

y=3x21y = \sqrt{3} \cdot \sqrt{x^2 - 1}

Let’s differentiate this step by step.


Step 1: Rewrite the function

The given function can be rewritten as:

y=3(x21)1/2y = \sqrt{3} \cdot (x^2 - 1)^{1/2}

Step 2: Differentiate using the chain rule

The derivative of yy with respect to xx is:

dydx=3ddx((x21)1/2)\frac{dy}{dx} = \sqrt{3} \cdot \frac{d}{dx} \left( (x^2 - 1)^{1/2} \right)

Now, apply the chain rule to differentiate (x21)1/2(x^2 - 1)^{1/2}:

ddx((x21)1/2)=12(x21)1/2ddx(x21)\frac{d}{dx} \left( (x^2 - 1)^{1/2} \right) = \frac{1}{2} (x^2 - 1)^{-1/2} \cdot \frac{d}{dx}(x^2 - 1)

The derivative of x21x^2 - 1 is 2x2x. So:

ddx((x21)1/2)=12(x21)1/22x\frac{d}{dx} \left( (x^2 - 1)^{1/2} \right) = \frac{1}{2} (x^2 - 1)^{-1/2} \cdot 2x

The 22 cancels out:

ddx((x21)1/2)=xx21\frac{d}{dx} \left( (x^2 - 1)^{1/2} \right) = \frac{x}{\sqrt{x^2 - 1}}


Step 3: Substitute back

Now substitute this into the derivative of yy:

dydx=3xx21\frac{dy}{dx} = \sqrt{3} \cdot \frac{x}{\sqrt{x^2 - 1}}


Final Answer:

dydx=3xx21\frac{dy}{dx} = \frac{\sqrt{3} \cdot x}{\sqrt{x^2 - 1}}

Would you like further clarification or additional steps? 😊


5 Related Questions:

  1. How do we handle derivatives of square roots in general?
  2. What happens if x210x^2 - 1 \leq 0? What are the restrictions on xx?
  3. How do we apply the product rule if there are two terms in a function like this?
  4. Can we simplify the derivative further if given specific values of xx?
  5. How do derivatives involving radicals appear in applications, like physics?

Tip:

Always check the domain of the original function when working with square roots—it ensures the function is well-defined! For this case, x21>0x^2 - 1 > 0, so x>1x > 1 or x<1x < -1.

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Math Problem Analysis

Mathematical Concepts

Differentiation
Chain Rule
Radical Functions

Formulas

Derivative of a function: dy/dx
Chain rule: d/dx[f(g(x))] = f'(g(x)) * g'(x)
Derivative of (x^n): n * x^(n-1)

Theorems

Chain Rule of Differentiation

Suitable Grade Level

Grade 11-12 (High School Calculus)