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What countries took part in brazil International Mathematical Olympiad? In formally proving that lim x->1 (1/9x-1)=-8/9, let ε>0 be arbitrary. Determine δ as a function of ε. please write epsilon for ε for answer? Quick math help Please? If there is intelligent life out there somewhere in space why do people assume it will be similar to humans? How do you solve 5√2 -4√18 + √36?