Math Problem Statement

Laplace of t^(4/3)

Solution

To find the Laplace transform of t4/3t^{4/3}, we use the general formula for the Laplace transform of tnt^n, where n>1n > -1:

L{tn}=Γ(n+1)sn+1\mathcal{L}\{t^n\} = \frac{\Gamma(n+1)}{s^{n+1}} Here, Γ(n+1)\Gamma(n+1) is the Gamma function, which generalizes the factorial. For t4/3t^{4/3}, we have n=4/3n = 4/3.

Thus, the Laplace transform is:

L{t4/3}=Γ(43+1)s43+1=Γ(73)s7/3\mathcal{L}\{t^{4/3}\} = \frac{\Gamma\left(\frac{4}{3} + 1\right)}{s^{\frac{4}{3} + 1}} = \frac{\Gamma\left(\frac{7}{3}\right)}{s^{7/3}}

The Gamma function Γ(73)\Gamma\left(\frac{7}{3}\right) can be evaluated numerically. Using properties of the Gamma function:

Γ(73)1.504\Gamma\left(\frac{7}{3}\right) \approx 1.504

So, the Laplace transform of t4/3t^{4/3} is approximately:

L{t4/3}1.504s7/3\mathcal{L}\{t^{4/3}\} \approx \frac{1.504}{s^{7/3}}

Would you like further details on how to compute the Gamma function or explore its properties?

Here are five related questions:

  1. What is the Laplace transform of tnt^n for other fractional powers?
  2. How does the Gamma function generalize factorials for non-integer values?
  3. What is the significance of the Gamma function in probability and statistics?
  4. Can you find the inverse Laplace transform of 1s7/3\frac{1}{s^{7/3}}?
  5. How does the Laplace transform help in solving differential equations?

Tip: The Gamma function Γ(n)\Gamma(n) is an extension of the factorial function for real and complex numbers, with Γ(n)=(n1)!\Gamma(n) = (n-1)! for positive integers nn.

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Math Problem Analysis

Mathematical Concepts

Laplace Transform
Gamma Function
Fractional Powers

Formulas

Laplace transform of t^n: L{t^n} = Γ(n+1) / s^(n+1)
Gamma function: Γ(n) = (n-1)! for positive integers

Theorems

Gamma Function Properties
Laplace Transform of Power Functions

Suitable Grade Level

Undergraduate Math