Traditional Culture Encyclopedia - Hotel accommodation - (20 two four? Guang 'an One Module) Known function f( 1)= 2? 1。 N ground 08; 2- 1-m has zero, so the value range of m is _ _ _ _.

(20 two four? Guang 'an One Module) Known function f( 1)= 2? 1。 N ground 08; 2- 1-m has zero, so the value range of m is _ _ _ _.

∫f(x)= it？ x2-(x+m)，

Let g(x)= it? x2，5(x)=x+m，

Draw images of g(x) and 5(x),

It can be seen from the image that:-When it is ≤m≤2, the function g(x) intersects with the function 5(x),

That is, the function f(x) has zero,

So the answer is: [-it, 2].