Fortune-telling disk 1000_ What does it mean that fortune-telling disk is not profitable?

What kind of geomantic function does the fortune-telling compass have?

The disk surface of compass or compass (north) needle must be horizontal, and the needle cannot be tilted or lowered at the same time. At the same time, we should pay attention to whether the connection between the disk surface and the disk body is tight, and there should be no looseness or damage.

Want to improve as soon as possible, or want to know your fortune.

It will be adjusted and improved according to the status quo of the friends.

Promote career fortune and health fortune.

If you have any views on the fortune of traditional numerology or the eight-character "marriage numerology prediction"! Master Ta (oral color \ micro/? : 3 9 9 6, 1 9,4)

X 1, x2∈(-∞0] and x 1 < x2, then

f(x 1)-f(x2)=(2x 1+2-x 1)-(2 x2+2 x2)=(2x 1 2x 1- 1 2 x2)=(2x 1-2 x2)(2x 1-2 x2)(2x 12 x2- 1)？ 2x 12x2？

∵x 1