Answer
The miller indices for the plane A is $(2,1,\bar 1) $
The miller indices for the plane B is $(0,2,\bar1)$
Work Step by Step
Plane A intersects the x-axis at $\frac{1}{2}$, y axis at $1$ and negative z axis at $1$
The intercept point for plane A is $(\frac{1}{2},1,-1)$
The miller indices for plane A are $(2,1,\bar 1) $
Plane B intersects the x-axis at $\infty$, y axis at $\frac{1}{2}$, and negative z axis $1$
The intercept point for the plane B is $(\infty,\frac{1}{2},-1)$
The miller indices for plane B are $(0,2,\bar1)$
