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Let X be a set, and let A,B,C⊆X be subsets. Suppose that A∩B= A∩C, and that (X−A)∩B = (X−A)∩C. Prove that B =C? Calculus help with two particles traveling in the same direction.? What are the products formed when ethane burns in excess oxygen? What do you predict would happen if there is a worldwide blackout? The fifth term of (2x + 5y)^8 is 700,000x^4y^4. Is this true or false?