FMAX: Function maximum

syntax: FMAX(expr, varname, lower, upper) or
FMAX(expr, varname, lower, upper, exclopt, prec)

returns the value at which the maximum value for expression with respect to variable <varname> occurs, between <lower> and <upper> values for <varname>. <lower> must be less than <upper>. The precision of the calculation can be specified with the (optional) variable <prec> which if not explicitly specified is 1E-5. The optional exclopt argument can either be: INCLUDE ENDS or EXCLUDE ENDS If EXCLUDE ENDS is specified then the lower and upper function endpoint values are not included when determining the minimum function value. By default INCLUDE ENDS is specified.