Current location - Training Enrollment Network - Mathematics courses - Mathematics in senior three, such as why the answer to the eighth question made by derivative is different from the standard answer. After derivative, there is only a in the molecule, so it is not tha
Mathematics in senior three, such as why the answer to the eighth question made by derivative is different from the standard answer. After derivative, there is only a in the molecule, so it is not tha
Mathematics in senior three, such as why the answer to the eighth question made by derivative is different from the standard answer. After derivative, there is only a in the molecule, so it is not that A is greater than or equal to 0. y= 1-a/(x+a)

y'=a/(x+a)^2

(x+a)^2>; 0, so you need a≥0, and your first step is correct.

But obviously this is not enough. Because the topic requirement is (-2, +∞), this is a continuous interval.

Therefore, the possibility of discontinuity must be ruled out.

Obviously, the discontinuity of this function is x =-a.

So there is -a≤-2.

a≥2