If gravitational potential is `V = xy^(2)`, find the gravitational field at `(2,1)`

Explanation

To find the gravitational field at the point (2, 1) given the gravitational potential \( V = xy^2 \), we will follow these steps:

### Step 1: Understand the relationship between gravitational potential and gravitational field
The gravitational field \( \vec{E} \) can be derived from the gravitational potential \( V \) using the following relationships:
\[ E_x = -\frac{\partial V}{\partial x} \]
\[
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