Let a > 1, then log (0.2) a, the power of 0.2 a, the power of 0.2 a

Let a > 1, then log (0.2) a, the power of 0.2 a, the power of 0.2 a

Because log (0.2) a, the a-power of 0.2 are inverse functions of each other, it can be seen from the drawing that when a > 1, 0

It's better to solve it once in one yuan
At the beginning, a was at a and B was at C. at the same time, they set out. At the first meeting, a walked 50 meters. At the second meeting, B walked another 20 meters to return to the beginning of C. what is the perimeter of this road?
Party A and Party B walk along the rectangular road ABCD. At the beginning, a is at a and B is at C. at the same time, a walks 50 meters at the first meeting. At the second meeting, B walks another 20 meters to return to C. what is the perimeter of this road?

Let the perimeter of the road be X. it is easy to know that the two people walked half of the total distance when they first met. The sum of the distance they walked from the first meeting to the second meeting is exactly equal to the perimeter of the road

Junior mathematics problems, seek master to solve!
When Xiao Wang went out at 6:00 p.m., he looked up at the clock. The angle between the two hands was 135 degrees. When he came back, the angle between the hour hand and the minute hand was still 135 degrees, and it had not been played yet. How long did Xiao Wang go out?
2. There is an electronic clock on the clock tower of a railway station. On the boundary of the clock face, there is a small colored light at the scale of every minute. At 93:05:20 at night, how many colored lights are installed in the minimum angle a between the hour hand and the minute hand?

1. According to the surface diagram of the clock
The hour hand rotates 360 degrees in 12 hours and 30 degrees in each hour;
The minute hand turns 360 degrees in 60 minutes, 6 degrees per minute
Set the time to go out is 6:00 X minutes
Then the angle between the hour hand and 6 o'clock is (x / 60) * 30
At this time, the angle between the minute hand and 12 o'clock is 6x
The angle with 6 points is 180-6x
Because the angle between the hour hand and the minute hand is 135 degrees, the formula is given
(X/60)*30+180-6X=135
The simplified solution is x = 45 / 5.5
Set it back to 6:00 y minutes
Then the angle between the hour hand and 6 o'clock is (Y / 60) * 30
At this time, the angle between minute hand and 12 o'clock is 6y
The angle with 6 points is 6y-180
Because the angle between the hour hand and the minute hand is 135 degrees, the formula is given
6Y-180-(Y/60)*30=135
The simplified solution is y = 315 / 5.5
Exit time: Y-X = (315-45) / 5.5 = 270 / 5.5 = 49.1 points
2. 93:50:20, 93:00?