FindRoot function give wrong result

[Trần lê duy]

In [13]: FindRoot(2^x==0,{x,-100,100}, Method->Brent)
Out[13]: {x->-100.0}

[Axel Kramer]

For

x -> -100.0

the function approximates 0.0 in numeric mode:

>> N(2^(-100))
0.0

Symja uses the Hipparchus BrentSolver method in your example.

One requirement for this method is that "The given interval must bracket the root."

See: doc/functions/FindRoot.md

[Axel Kramer]

Fix issue #181 - improve FindRoot(9 error handling using: engine.printMessage()

→ <<cset fe1386d157eb>>

[Axel Kramer]

See https://github.com/axkr/symja_android_library/issues/103