BMO 1966 Problem 6 Find the largest interval over which f(x) = √(x - 1) + √(x + 24 - 10√(x - 1) ) is real and constant. Solution
: [1, 26]. f(x) is not real for x  26, f(x) = 2√(x - 1) - 5. 2nd BMO 1966 © John Scholes jscholes@kalva.demon.co.uk 30 Aug 2000