03-23-2020, 05:14 PM

I solve the equation TAN (3x) = - x ^ 2 + 3.

The calculator gives six solutions in the range {-3,633 to 2,695}. OKAY. When we set the range of solutions in the range x = 0 to 10, he will give all the solutions correctly. OKAY. Next, when we set x = 10 to 15, it will give only two solutions. However, there are 4 solutions. Now I set the range x = 25 to 30. HP Prime finds no solution. There are as many as 5 solutions in this range.

I checked how the TI-Nspire CX II-T calculator does it. I do all the examples great, perfectly. See this in the attached screenshots of both calculators.

[attachment=8209][attachment=8210]

The calculator gives six solutions in the range {-3,633 to 2,695}. OKAY. When we set the range of solutions in the range x = 0 to 10, he will give all the solutions correctly. OKAY. Next, when we set x = 10 to 15, it will give only two solutions. However, there are 4 solutions. Now I set the range x = 25 to 30. HP Prime finds no solution. There are as many as 5 solutions in this range.

I checked how the TI-Nspire CX II-T calculator does it. I do all the examples great, perfectly. See this in the attached screenshots of both calculators.

[attachment=8209][attachment=8210]