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Does anybody know the math game which involves 6 numbers and their either black or orange? How can i factorise y^1/2 - x^1/2? Glucose reacts with oxygen gas to produce gaseous carbon dioxide and water vapor? True or False.According to Dalton, Elements have isotopes? What is the derivative of the sqrt of 2x? The book says the answer is the sqrt of 2/2•sqrt x. But I keep getting 1/sqrt(2x).?