The Newton goal seek used returns a possible but undesired root for the default Guess value of 0.1 (10%) in these cases, already specifying a Guess value of 0.14 delivers the expected results.
The Newton goal seek used returns a possible but undesired root for the default Guess value of 0.1 (10%) in these cases, already specifying a Guess value of 0.14 delivers the expected results.