A polynomial function f(x) with integer coefficients has a leading coefficient of –3 and a constant term of 2. According to the Rational Root Theorem, which of the following are possible roots of f(x)?

Use stokes' theorem to evaluate c f · dr where c is oriented counterclockwise as viewed from above. f(x, y, z) = xyi + 5zj + 7yk, c is the curve of intersection of the plane x + z = 8 and the cylinder x2 + y2 = 81.