HP50g or other: U. of Houston calc exams

[Gilles]

(08-05-2015 04:58 AM)Peter Murphy Wrote:  I'd be interested in seeing solutions to 2015 problem 23,

Here is my idea for problem 23 (but i dont know what is a " vertice", perhaps I misundertsood the problem), exact mode, rigorous on

['-1-X' '2-X²'] ['2-X' '7-X²'] CROSS ABS 2 / (here we have the aera of the triangle, function of X)
ENTER (dup the result )
DERVX (to get the extremum , then delete the sign part of the derivate because we search the root)
SOLVEX (here we get -> X=5/6 )
SUBST EVAL

-> 157/24