If F=(2x^2-3z) i cap -2xy j cap - 4x k cap then evaluate triple integr...
If F=(2x^2-3z) i cap -2xy j cap - 4x k cap then evaluate triple integr...
**Given Information:**
The vector field F is given as:
F = (2x^2 - 3z) î - 2xy ĵ - 4x k̂
The region V is bounded by the planes x = 0, y = 0, z = 0, and 2x + 2y + z = 4.
**Evaluation of Triple Integral of ∇F:**
To evaluate the triple integral of ∇F, we need to find ∇F first.
The gradient of a vector field F is given by:
∇F = (∂F/∂x) î + (∂F/∂y) ĵ + (∂F/∂z) k̂
Taking partial derivatives of F with respect to x, y, and z:
∂F/∂x = 4x î - 2y ĵ - 4 k̂
∂F/∂y = -2x ĵ
∂F/∂z = -3 î
Therefore, ∇F = (4x î - 2y ĵ - 4 k̂) î - (2x ĵ) ĵ - 3 î = (4x - 3) î - 2xy ĵ - 4x k̂
**Defining the Region V:**
The region V is bounded by the planes x = 0, y = 0, z = 0, and 2x + 2y + z = 4.
To visualize the region V, we can look at the intersection of these planes. The plane x = 0 represents the yz-plane, the plane y = 0 represents the xz-plane, and the plane z = 0 represents the xy-plane. The equation 2x + 2y + z = 4 can be rewritten as z = 4 - 2x - 2y.
Considering these equations, we can see that the region V is a tetrahedron with vertices at (0, 0, 0), (2, 0, 0), (0, 2, 0), and (0, 0, 4).
**Evaluating the Triple Integral:**
The triple integral of ∇F over the region V can be written as:
∫∫∫ (∇F) dV
Using the divergence theorem, this can be rewritten as:
∫∫∫ ∇⋅F dV
The divergence of F is given by:
∇⋅F = ∂(4x - 3)/∂x + ∂(-2xy)/∂y + ∂(-4x)/∂z
= 4 - 2y
Now, we need to evaluate the triple integral of (4 - 2y) over the region V.
Using the given bounds for x, y, and z, the triple integral becomes:
∫(0 to 4) ∫(0 to 2 - x/2) ∫(0 to 4 - 2x - 2y) (4 - 2y) dz dy dx
Solving the