1 
			rishabh
					·2011-12-16 09:37:42
			is it,
[\frac{1-\sqrt{28}}{9},\frac{1+\sqrt{28}}{9}]
 
			
		 
			
					
1 
			Abhinav Gupta
					·2011-12-16 10:56:50
			No,the answer is
[3-2√117,12] union [3,3+2√117]union {1}
 
			
		 
			
					
1 
			Abhinav Gupta
					·2011-12-24 09:03:21
			Somebody post a solution,please Or atleast give some hint
 
			
		 
			
					
1 
			fahadnasir nasir
					·2011-12-24 09:25:25
			abh. I use differentiation for the function and find the critical points that give the max and min for the function.