Now I reviewed these things and the procedure is not complicated.
I'll solve this one, may be it may help someone else.
For which is false. For which is false. Hence, we gotta study the following three cases.
- Case #1: if The inequality becomes First solution it's actually
- Case #2: if The inequality becomes which is false, so we have no solution here.
- Case #3: if The inequality becomes Second solution it's actually
Final solution will be given by