My text book and teacher has shown the answer in this format : {y|y is a real number and y =/ 0} is that the same as that Everything but 0(TR =/ 0) ? ~Kevin

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It sounds like your teacher prefers set notation. But you're right that {y|y is a real number and y is not 0} describes the same set of numbers as the statement "all real numbers except 0". {y|y is a real number and y is not 0} is the answer in set notation. In your last answer, TR /= 0, it looks like you mean TR = the set of real numbers. It's the R with the extra vertical bar that I can't type in this format. Well, technically the way you would express that answer is TR - {0}. That means "the set of real numbers" minus "the set that contains only zero." It's ever so slightly incorrect to write TR /= 0 because the thing on the left is a set and the thing on the right is a number.