Long description: Block262_Fig9b
Alt text: The image shows two closed circles, labeled \(C_2\) and \(C_3\), drawn on the complex plane with the horizontal axis as the real axis and the vertical axis as the imaginary axis.
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- The image displays a coordinate plane representing the complex plane, with the horizontal axis labeled \(x\) (the real axis) and the vertical axis labeled \(y\) (the imaginary axis).
- The circle labeled \(C_3\) is a large, solid circle centered at the origin, encompassing a significant portion of the plane.
- Inside the larger circle \(C_3\), there is a smaller, solid circle labeled \(C_2\).
- The smaller circle \(C_2\) appears to be centered at the point \((0, -1)\), or \(-i\) on the imaginary axis, and it is entirely contained within the larger circle \(C_3\).