Exponential function differentiation

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Discussion Overview

The discussion revolves around the differentiation of the exponential function and its implications, particularly focusing on the physical meaning of the function's property where its derivative is equal to the function itself. The scope includes conceptual understanding and applications in real-world scenarios such as population growth and compound interest.

Discussion Character

  • Conceptual clarification
  • Exploratory

Main Points Raised

  • One participant questions the physical meaning of the exponential function remaining unchanged after differentiation, suggesting a need for clarification on the concept.
  • Another participant explains that the exponential function's derivative being equal to the function itself indicates that the instantaneous rate of change at any point is equal to the function's value at that point.
  • A further response emphasizes the physical interpretation, linking the property of the exponential function to real-world phenomena such as population growth and compound interest, where the rate of change is proportional to the current quantity.

Areas of Agreement / Disagreement

Participants generally agree on the interpretation of the exponential function's derivative, but there is some ambiguity regarding the "physical meaning" of this mathematical property, as one participant seeks further clarification.

Contextual Notes

The discussion does not resolve the deeper implications of the physical meaning of the exponential function, leaving some assumptions about the interpretation open to further exploration.

cooper607
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if first derivative is the slop of the given functions, then what is the physical meaning of exponential function remaining the same function after differentiation??

does it mean its vertical tangency make it indifferentiable?
please clarify me the concept...

regards
 
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It means that the curve of the exponential function has the same instantaneous rate of change at a given point as its value.
 
I'm afraid you will have to tell us what you mean by the "physical meaning" of a mathematics statement.
 
cooper607 said:
if first derivative is the slop of the given functions, then what is the physical meaning of exponential function remaining the same function after differentiation??

It means that the rate of change at a given point is the same as the value of the function at that point. So, what does this mean physically? Suppose I have a population of things that reproduce -- people on earth, bacteria in a dish, whatever. Since they're reproducing like crazy, the number of new individuals in any given interval of time is proportional to how many individuals there already are. If there are lots of individuals, then there will be lots of new individuals made.

That's why the exponential function is intimately involved in the growth of populations.

Same thing with compound interest. The amount of interest you get is proportional to how much money you already have. And the formula for compound interest does in fact turn out to be an exponential function.

That's the physical meaning. The amount of growth (the derivative) is proportional to the amount of stuff that's already there.
 
wow! thanks a lot...now i got my answer..
regards
 
wow! thanks a lot...now i got my answer..
regards
 

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