- Real analysis homework question?

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Has their been any cases of solar eclipse glasses not working. Any one know? Suppose u,v and w are vectors R^3 such that u.v=u.w If ProjuW=ProjvW, determine the relationship between u and v. Give all the reasons.? If x and y are the real roots of x³ - 3x² + 5x -17 = 0, and y³ - 3y² + 5y + 11 = 0., find x + y.? Is the square root of 2x^2 2x or the square root of 2 times x? Desert air always feels expansive to me, as though the molecules that make up the air are farther apart. Why is this?