Estimate Smallest Distance Between (0,0) and y=e^x

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SUMMARY

The discussion focuses on estimating the smallest distance between the point (0,0) and the curve defined by the equation y = e^x using the Intermediate Value Theorem (IVT) and Rolle's Theorem (RT). The distance function is represented as d² = x² + e²x. It is established that RT indicates the existence of a point where the tangent to d² is horizontal, confirming the presence of a minimum distance. By applying IVT to the derivative of the distance function, the minimum distance can be accurately determined.

PREREQUISITES
  • Understanding of the Intermediate Value Theorem (IVT)
  • Familiarity with Rolle's Theorem (RT)
  • Knowledge of calculus, specifically derivatives
  • Basic concepts of distance functions in coordinate geometry
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  • Study the application of the Intermediate Value Theorem in optimization problems
  • Explore Rolle's Theorem and its implications in finding critical points
  • Learn about distance functions and their derivatives in calculus
  • Investigate methods for estimating minimum distances in multivariable functions
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Students and educators in mathematics, particularly those focusing on calculus and optimization techniques, as well as anyone interested in applying theorems to real-world distance estimation problems.

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"Using IVT and RT work out an estimate for the smallest distance between the point (0,0) and the curve
y = e^x "
Can anyone help me with this question? Thanks.


Note: IVT is "Intermediate Value Theorem" and RT is "Rolle's Theorem"
 
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What is the function for distance between the points (0,0) and (x,e^x)?
 
d2=x2+e2x

RT says there is a point where the tangent (to d2) is horizontal, since the function ->+∞ for both x and -x ->∞. This would be the minimum.

Use IVT on the derivative of x2 let's you find the minimum (0 derivative), since the derivative goes to +∞ as x goes to +∞, while it goes to -∞ as x goes to -∞.
 

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