Fri Apr  9 16:13:42 2021 

fsolve_test
  R version 3.4.4 (2018-03-15) 
  fsolve() solves one or more nonlinear equations.
  In MATLAB, fsolve() is in the Optimization toolbox.
  In Octave, fsolve() is directly available.
  In Python, fsolve() is scipy.optimize.
  In R, fsolve() is available through the pracma library.

fsolve_test02
  Use fsolve() to solve 2 nonlinear equations.

  The initial vector x0:  [1] 3 0
  The function value f(x0):  [1] -13  11
  The final vector x:  [1] 1 1
  The function value f(x):  [1] -9.619328e-11 -1.235385e-10

fsolve_test03
  Use fsolve() to solve 4 nonlinear equations.

  The initial vector x0:  [1] 0 0 0 0
  The function value f(x0):  [1]  1  4  9 16
  The final vector x:  [1] 0.9999784 1.9999569 2.9999353 3.9999137
  The function value f(x):  [1] 4.651181e-10 1.860473e-09 4.186063e-09 7.441890e-09

fsolve_test04
  Use fsolve() to solve 8 nonlinear equations.

  The initial vector x0:  [1] 0 0 0 0 0 0 0 0
  The function value f(x0):  [1] 1 1 1 1 1 1 1 1
  The final vector x:  [1] -0.5704698 -0.6811406 -0.7004285 -0.7006725 -0.6917363 -0.6657674 -0.5960292
[8] -0.4164110
  The function value f(x):  [1] -2.213960e-10 -1.255562e-10  1.477924e-09 -2.519739e-09  1.553274e-09
[6] -1.128981e-09  4.821343e-10  5.562949e-10

fsolve_test
  Normal end of execution.
Fri Apr  9 16:13:42 2021