What are the characteristics of the circle function x^2 + y^2 = r^2? Is it always centered at the origin? Does it have a constant radius? Does it intersect the x and y axes? Does it have symmetry?
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What is the domain and range of the logarithmic function f(x) = log x / f(x) = ln x? Compare and describe the differences between their graphs in terms of shape and behavior.
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What is the product of the mixed number 2 1/2 and the factored number 4^2? How does this product relate to real numbers?