Needs Answer
CAS:
f(x) := x+1
solve(f(x)>0,x)
-> x>-1
Good!
CAS:
f(x):=if(x<0,x+1,x>=1,x+2)
solve(f(x)>0,x)
-> ?
Bad...
Why does the "good" work, but the "bad" does not work!
The same question 
CAS:
f(x) := x+1
solve(f(x)>0,x)
-> x>-1
Good!
CAS:
f(x):=if(x<0,x+1,x>=1,x+2)
solve(f(x)>0,x)
-> ?
Bad...
Why does the "good" work, but the "bad" does not work!
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