5. For real numbers a, b(a> b > 0), let Area (x,y):x+y2 sa and ea{(x,y):x x y + 1 30 and a b 6. ea{(x,y): x v Area (x,y): x+y2 b and 1 + 1=18 a b Then the value of (a - b) is equal to........... Let f and g be twice differentiable even functions on (-2, 2) such that 3 f(4) = 0, f() = 0, f(1) = 1 and f(2) =0, g(1)=2 2 4 Then, the minimum number of solutions of f(x)g"(x)+f'(x) g'(x)=0 in (-2,2) is equal to..........