Who knows 20 10 (Nanchang's paper), the last question of mathematics in the final exam of senior one last semester (that is, just finished the exam)

20. Solution: The two zeros of the (1) function are and satisfy.

∴ or

The solution is ... 4 o'clock.

(2) By the meaning of the question, and 5 points.

(1) When

There is a minimum value of 6 points.

At this point, if the function has a maximum value, it must be a minimum value, and

∴∴ ........................................................ 7.

The solution is 8 points.

(2) When there is a maximum value.

Nine points

At this point, if the function has a maximum value, it must be a minimum value, and

∴ solution score or ................................... 10.

∴ ...........................................11min.

To sum up, the maximum value of the function must be the sum of the minimum value or .............. 12.

(Volume I)

20. Solution: (1),

∴, ................................................................................................................................. 2 points.

, ∴ ,

∴ ; Five points.

(2) Settings,

Then =， …… 10…… 10…… 10…… 10…… 10…… 10…… 10…… 10…… 10…… 10…… 10…… 10…… / kloc-0/0…… 10…… 10…… 10…… 10…… 10…… 10……

In the world, increase the function, ∴ ........................................... 8 points.

Say it again,

In other words, Shangheng was established.

, ∴ is the .................................... 12 you want.

(Volume II)