Recent content by Jamo1991

  1. J

    Finding the integral of a function

    For equations of this form, where the numerator is the derivative of the denominator, the integral is simply the natural logarithm of the denominator. So in this case it would be ln|x^3+2| + a constant of integration.
  2. J

    Direct Sum of Vectors in R^4: Determine Which Sums Are Direct and Equal to R^4

    Homework Statement In R^4 which of the following sums U+V, U+W and V+W are direct? Give reasons And which of these sums equal R^4? Homework Equations U = {(0, a, b, a-b) : a,b ∈ R} V = {(x, y, z, w) : x=y, z=w} W = {(x, y, z, w) : x=y} The Attempt at a Solution I put that none are direct...