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Maths Made Easy TMUA Paper 1 · Q9

Paper 1Algebra

For positive real numbers x,yx,y define

S=xy+yx+x+y.S=\frac xy+\frac yx+x+y.

Which is the greatest lower bound of SS?

A22
B2+222+2\sqrt2
C66
D3+233+2\sqrt3
E88

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