# Q.9. A function 'f' is defined for all real numbers and satisfies f (2 +  x) = f (2 -  x) and f (7 +  x) = f (7 -  x) for all real x. If x = 0 is a root of f (x) = 0, then find least number of roots of f (x) = 0 for x$\in$[- 1000, 1000].

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