For isosceles trapezoid ABCD, BC = 3 times root number, 18 times lower, AE = 32 times lower, Mn = 3 times root number, 8 times lower?

For isosceles trapezoid ABCD, BC = 3 times root number, 18 times lower, AE = 32 times lower, Mn = 3 times root number, 8 times lower?

Two times the median length = the sum of the top and bottom = six times the root 8
It's too much trouble. I'll help you find out all the root numbers 8, 18 and 32. So the top and bottom length is 6 times of the root number 8-3 times of the root number 18 = 3 times of the root number 2. Then I'll work out the height. The Pythagorean theorem is used to find out the length of the oblique side

(2-3 × 5 to the power of - 1) + (4-3 × 5 to the power of - 2) +. + (2n-3 × - n)

If we have a parallelogram, we can conclude that some angles are equal,
Because angle DHB + angle B + angle HDB,
So angle GAH + angle HDG = (180 ° - α) / 2 ①
Angle g = 180 ° - angle gab - angle APG ②
Angle APG = angle CDP = angle CDH + angle HDP ③
① The angle g = 90 ° - 1 / 2 α can be obtained

Sum: SN = 0.1 + 0.11 + 0.111 +... + 0.11... 111

In doing so, you want SN to be the sum of the first n terms of the sequence an
a(n)=a(n-1)+10^(-n)
a(2)=a(1)+10^(-2)
a(3)=a(2)+10^(-3)
a(4)=a(3)+10^(-4)
.
a(n)=a(n-1)+10^(-n)
Add it all up: eliminate the left and right equivalents
a(n)=10^(-1)+10^(-2)+10^(-3)+...+10^(-n)
Can the sum of the first n terms of an equal ratio sequence be solved?
a(n)=(-1/9)10^(-n)+1/9
s(n)=(-1/9)((-1/9)10^(-n)+1/9)+n/9 =1/81(-1+10^(-n)+9n)

Find the maximum and minimum values of the square-4x + 1 of the function y = x where x belongs to [T, 4]

According to the function, the symmetry axis X = 2
1. When t > 2, x = t, take the minimum value (self calculation), x = 4, take the maximum value
2. When 0

The voltage () at both ends of each branch in parallel circuit is equal to () voltage?
Fill in the blanks, thank you

The voltage at both ends of each branch of a parallel circuit is equal to the (power) voltage

Help out a few questions about fraction reduction and multiplication and division,
All are multiplication and division of the line, but slightly more difficult
If you can, please write down the answer,
Note that it's a fraction, not a fraction. It's fractions that contain letters

6 out of 18. A: 1 out of 3
924 divided by 7 answer: 132
428 times 54 A: 23112

The specification of microwave oven is 220V 1100W. When the maximum heating power is used for heating, the main circuit current in the home circuit increases a lot
The specification of a microwave oven is 220V 1100W. When using the maximum heating power, how much a does the main circuit current increase in the home circuit?
How much more electricity is needed in a month (30 days) if it takes one hour per day on average?

1.I=P/U=1100W/220V=5A
A: how much is the increase of trunk current in home circuit
2.P=1100W=1.1KW
W=PT=1.1KW*1h*30=33KW.H
Then one month (30 days) needs to use 33 kwh more electricity

Simplified evaluation: (x2 − 16x2 + 8x + 16 + XX − 4) △ 1x2 − 16, where x = 2 + 1

The original formula = (x − 4x + 4 + XX − 4) · (x + 4) (x − 4) (2 points) = (x-4) 2 + X (x + 4) (3 points) = 2x2-4x + 16; (4 points) when x = 2 + 1, the original formula = 2 (2 + 1) 2 − 4 (2 + 1) + 16 (5 points) = 18. (7 points)

How to convert 110V to 220V

You need to buy a supercharger (inverter), which has the function of 110 to 220. In addition, you need to see how much power your electrical equipment consumes and whether it meets the requirements. If not, don't buy it, or it will burn your supercharger (inverter)

As shown in the figure, ab = 5M and CD = 2m of the wooden stick standing on the wall obliquely, and the distance between the wooden stick landing end and the wall is be = 3M and de = 1m respectively. Try to judge which wooden stick is steeper

There is no picture. Just look at the vertical divided by the horizontal length