**ljdickey@watmath.UUCP** (09/13/83)

It is wrong to say that both 1 and -1 are square roots of 1. Only one of them is a square root of 1, even though they both square to 1. Any decent modern calculus book will give you a good example or two of this. For instance, the widely used text by Thomas, "Calculus and Analytic Gemoetry", 4th edition, published by Addison-Wesley, on page 16 points out that the absolute value of x equals the square root of x squared. Notice that this relies on the idea that the square root be non-negative. -- Lee Dickey, University of Waterloo. (ljdickey@watmath.UUCP) ...!allegra!watmath!ljdickey ...!ucbvax/decvax!watmath!ljdickey