Bytelearn - cat image with glassesAI tutor

Welcome to Bytelearn!

Let’s check out your problem:

What is the value of 
(d)/(dx)(x^((5)/(4))) at 
x=16 ?

What is the value of ddx(x54) \frac{d}{d x}\left(x^{\frac{5}{4}}\right) at x=16 x=16 ?

Full solution

Q. What is the value of ddx(x54) \frac{d}{d x}\left(x^{\frac{5}{4}}\right) at x=16 x=16 ?
  1. Apply Power Rule: To find the derivative of x54x^{\frac{5}{4}} with respect to xx, we will use the power rule for differentiation, which states that if f(x)=xnf(x) = x^n, then f(x)=nxn1f'(x) = n \cdot x^{n-1}.
  2. Calculate Derivative: Applying the power rule to x5/4x^{5/4}, we get f(x)=54x(541)=54x1/4f'(x) = \frac{5}{4} \cdot x^{\left(\frac{5}{4}-1\right)} = \frac{5}{4} \cdot x^{1/4}.
  3. Substitute x=16x=16: Now we need to evaluate the derivative at x=16x=16. So we substitute xx with 1616 in the derivative we found: f(16)=(54)1614f'(16) = (\frac{5}{4})\cdot16^{\frac{1}{4}}.
  4. Find Fourth Root: To simplify 161/416^{1/4}, we need to find the fourth root of 1616. The fourth root of 1616 is 22 because 24=162^4 = 16.
  5. Substitute in Derivative: Substitute 161/416^{1/4} with 22 in the derivative: f(16)=542f'(16) = \frac{5}{4}\cdot2.
  6. Final Derivative Value: Now we multiply (54)(\frac{5}{4}) by 22 to get the final value of the derivative at x=16x=16: f(16)=(54)2=52f'(16) = (\frac{5}{4})\cdot2 = \frac{5}{2}.

More problems from Operations with rational exponents