Find the Zeros of the Equation

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SUMMARY

The equation (exp(x)/x^3)=2x+1 presents a challenge in finding its zeros analytically. The transformation to e^x=2x^4+x^3 indicates that algebraic methods are insufficient for solving this equation. Instead, the Lambert W function may be applicable, but it is not the preferred approach for the user. Numerical solutions or graphing techniques are necessary to identify the zeros of this transcendental equation.

PREREQUISITES
  • Understanding of transcendental equations
  • Familiarity with the Lambert W function
  • Knowledge of numerical methods for root finding
  • Basic calculus concepts, including exponential functions
NEXT STEPS
  • Study the properties and applications of the Lambert W function
  • Learn numerical methods for root finding, such as Newton's method
  • Explore graphing techniques for visualizing transcendental equations
  • Investigate software tools for numerical analysis, such as MATLAB or Python's SciPy library
USEFUL FOR

Students in calculus or advanced mathematics courses, educators teaching transcendental equations, and anyone interested in numerical methods for solving complex equations.

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Homework Statement


i have a problem i tried to solved about 3 days and i couldn't ... here it is :

(exp(x)/x^3)=2x+1

Homework Equations





The Attempt at a Solution


((e^x)/(x^3))=2x+1 > e^x=2x^4+x^3 >> (x=ln(2x^4+x^3) or 2x^4+x^3-e^x=0) ,, is it possible to get the zeros from the 2 solutions without graphing ??
 
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There is not going to be any "algebraic" method of solving that. You might be able to put it in terms of the Lambert W function but that's probably not what you want. Generally speaking, equations that involve the unknown variable both inside and outside a transcendental function require either "special functions", such as the Lambert W, or numerical solutions, such as graphing.
 
thanks very much :)
 

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