Question
Describe in words the region of $ \mathbb{R}^3 $ represented by the equation(s) or inequality.$ 1 \le x^2 + y^2 + z^2 \le 5 $
Step 1
Step 1: The equation $x^2 + y^2 + z^2 = r^2$ represents a sphere in $\mathbb{R}^3$ with radius $r$ centered at the origin. Show more…
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