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Mathematics problems in senior high school: how to solve three-dimensional problems
Round a root and divide it by algebraic expression.

You may not be able to, but you can do this:

On the left is a function F(x)

Deduction;

Find the minimax point and draw the function image.

Guess where the root is;

If you can't do this problem, are you a sophomore? I don't know if you have learned it. . . No, ask again.