Finding number of solutions for a system of equations?

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Discussion Overview

The discussion revolves around finding the number of solutions for a system of equations involving variables k and v, with other constants present. The focus includes the theoretical aspects of solution existence and practical approaches to solving the equations using software tools.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested, Mathematical reasoning

Main Points Raised

  • One participant inquires about general theorems related to the number of solutions for the given system of equations.
  • Another participant notes that the equations appear identical and suggests that if S equals T, it simplifies the problem, allowing for a unique solution for v(k) except at k=0.
  • A later reply mentions that Mathematica could not solve the system, leading the participant to use Excel Solver instead, raising concerns about whether the obtained k and v values are the only real solutions.
  • Another participant asserts that there is no solution to the equations, pointing out a contradiction in the structure of the equations presented.

Areas of Agreement / Disagreement

Participants express differing views on the existence of solutions, with some suggesting a unique solution exists under certain conditions, while others claim that the equations lead to a contradiction, indicating no solutions are possible.

Contextual Notes

The discussion highlights potential limitations in the equations' structure and the reliance on specific software tools for finding solutions, which may not yield definitive results.

kochibacha
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Is there any general theorem on finding number of solutions to this system of equations(D e^(-k (a - t)) (1 - e^-kt) (1 - e^(-a k n)))/((1 - e^(-a k)) k t v) = S

(G e^(-k (a - t)) (1 - e^-kt) (1 - e^(-a k n)))/((1 - e^(-a k)) k t v) = Twhere k,v are variables and others are constant

*edited equations
 

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Last edited:
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The two equations look identical. If S=T that is fine, just a bit redundant. It is easy to solve for v(k) then, which has a unique solution everywhere apart from k=0 where the equation cannot be satisfied.
 
mfb said:
The two equations look identical. If S=T that is fine, just a bit redundant. It is easy to solve for v(k) then, which has a unique solution everywhere apart from k=0 where the equation cannot be satisfied.

thanks for the fast reply. The problem was actually Mathematica cannot solve these system of equations (picture attached) so I used Excel Solver to find k,v satisfying those two equations. I just wonder that the k,v that I got are the only real number solutions to this system.
 

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There is no solution. Your equations are "250 * something = 50 && 375 * something = 80", which quickly leads to a contradiction.
 

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