Current location - Training Enrollment Network - Mathematics courses - High school mathematics electives 4-5, list questions, such as a paragraph behind the objective function, how to understand? Be popular and detailed.
High school mathematics electives 4-5, list questions, such as a paragraph behind the objective function, how to understand? Be popular and detailed.
For quadratic function y=x? -bx+c, when x=b/2, the function has a minimum value of c-b? /4 (Imagine a function image)

It's just that x in your topic is an integer for a certain floor of a building, and when n+ 1 is an even number, x=(n+ 1)/2 is an integer, which can satisfy that x is an integer.

When n+ 1 is an odd number and x is not an integer, we should take an integer around (n+ 1)/2.