Evaluate the triple integral _E (xy)dV where E is a solid tetrahedron with vertices (0,0,0), (4,0,0), (0,1,0), (0,0,4)

I just can't seem to find the limits, of x,y and z

To find the limits of integration for the given triple integral, we need to determine the bounds for each variable, x, y, and z, that define the region of integration.

Let's analyze the given solid tetrahedron with vertices (0,0,0), (4,0,0), (0,1,0), and (0,0,4).

First, let's consider the limits of x. The base of the tetrahedron lies in the x-y plane, so the limits of x will depend on the position along the y-axis. Since the base is defined by the vertices (0,0,0), (4,0,0), and (0,1,0), the x-limits in terms of y will vary from x = 0 to x = 4 - (4/1)y.

Next, let's consider the limits of y. The base of the tetrahedron lies between y = 0 and y = 1.

Finally, let's consider the limits of z. The vertical height of the tetrahedron extends from z = 0 at the base to z = (4/4)x + (4/4)y = x + y along the plane connecting the vertices (0,0,4), (4,0,0), and (0,1,0). Thus, the limits of z will be from z = 0 to z = x + y.

Putting all these pieces together, the limits of integration for the given triple integral, where E is the solid tetrahedron, are:

0 ≤ x ≤ 4 - (4/1)y
0 ≤ y ≤ 1
0 ≤ z ≤ x + y

Therefore, you can evaluate the triple integral _E (xy)dV by integrating (xy) with respect to x, y, and z within these defined limits.