There is a function with 8 variables. There are certain constraints for each variable. The constraints are as follows. Under these constraints, I want to know when the function is positive and when it is negative. FunctionSign didn't work for me. Also Reduce did not work.
a>0, b>0, c>0, d>0, e>0, f>0, 1>=g>=-1, 1>=h>=-1
How can I learn if there is a range of each variable value over which the function is positive or negative.
