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F(|x|) < 3/2 Can anyone solve this question for me? I wonder if science can help black people speak? If the the oxidation number of ni at first is +2 and after the reaction is -3 how many electrons were gained? I am reading about waves.What does the word "note" mean ? If 5 coins are tossed, what is the probability that at most 4 will be a tails?