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4D Practice Problems
Here are some 4D functions for you to practice graphing. The answers have been graphed using a different color for each f value. 1. f(x,y,z) = (x2 + y2 + z2)1/2 a. k. a. f(r,t,p) = r Click here for a hint. Click here for the answer to problem 1. 2. f(x,y,z) = -x4 + 2x2 - y2 - 2z. Click here for a hint. Click here for the answer to problem 2. 3. f(x,y,z) = -x4 + 2x2 - y4 + 2y2 - z4 + 2z2 For the answer to problem 3, see The Best Homework Ever on Professor Banchoff's home page.
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