Discover Questions

If one theoretically entered a black hole, stayed there for an hour and came back out, would time have changed more than an hour in earth? Caesium is more metallic than Lithium justify? If f(x)=ln(x)+arctan(x), find the derivative of f^(-1)(2) (inverse of f(x))? (again). prove : x⁴ + y⁴ + z⁴ ≥ xyz(x + y + z) .? Find the points (x,y) on the graph y=x^2 that are closest to the point (0,2)?