Find the Cartesian form of equation of a plane whose vector equation is : ` vec rdot((- hat i+ hat j+2 hat k)=9`

Explanation

To find the Cartesian form of the equation of a plane given its vector equation, we can follow these steps:

### Step 1: Understand the given vector equation
The vector equation of the plane is given as:
\[ \vec{r} \cdot (-\hat{i} + \hat{j} + 2\hat{k}) = 9 \]
This indicates that the normal vector to the plane is \(\vec{n} = -\hat{i} + \hat{j} + 2\hat{k}\).
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