- #1
Justabeginner
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Homework Statement
How many continuous functions f are there which satisfy the equation (f(x)^2) = x^2 for all x?
Homework Equations
The Attempt at a Solution
What method should I use to solve this? Is there a specific strategy involved besides plug and chug? Off the top of my head, I can only think of f(x)= x, but that's just one. Thank you.