Help me please with a demonstration 'reductio ad absurdum'!
1. - substitution
- be a and b,two numbers greater or equal than 1 from the set of real numbers R,
- be n a number greater or equal than 3 from the set of real numbers R,
2. - conclusion
- there is always a and b such that equation is true: n=a+b+1
3. - demonstration
Thank you very much your all helps !