A math problem in junior high school= A linear equation with one variable 1 / 3A + X / 3 = 0 and 4a-4y-4 = 0 have the same solution 1) The value of a 2）（x+y)+（x+y）^2+(x+y)^3+…… +|The value of (x + y) ^ 2009

A math problem in junior high school= A linear equation with one variable 1 / 3A + X / 3 = 0 and 4a-4y-4 = 0 have the same solution 1) The value of a 2）（x+y)+（x+y）^2+(x+y)^3+…… +|The value of (x + y) ^ 2009

A linear equation with one variable 1 / 3A + X / 3 = 0 and 4a-4y-4 = 0 have the same solution
1）1/3a+x/3=0,x=-a
4a-4y-4=0,y=a-1,x=y.a-1=-a,a=1/2,x=y=-1/2,
2）（x+y)+（x+y）^2+(x+y)^3+…… +|（x+y)^2009
=(-1)+(-1）^2+(-1)^3+…… +|（-1)^2009
=（-1)^2009
=-1

Ask a math question,
In the quadrilateral ABCD, (I don't know if its DC is parallel to ab) if ad is parallel to BC, angle a = 60 degrees, find the degree of angle B, and find the degree of angle d by using the method without quantity

It can't be because you don't know if DC is parallel to ab. if you know DC is parallel to AB, you can get the degree of angle D

Recently, the market prices of garlic and mung beans have been rising strangely, and netizens jokingly call them "garlic you are cruel" and "beans you play". Take mung beans as an example, the market price in early May has reached 16 yuan / kg. The municipal government decided to take temporary price intervention measures and transfer mung beans to stabilize the market price. According to market research, the market price will drop by 1 yuan / kg for every 100 tons of mung beans In order to stabilize the market price and protect the enthusiasm of soybean farmers, the market price of mung bean should be controlled between 8 yuan / kg and 10 yuan / kg (including 8 yuan / kg and 10 yuan / kg)?

If the market price of mung bean is y yuan / kg, then y = 16-0.01x. According to the title, 8 ≤ y ≤ 10, i.e. 8 ≤ 16-0.01x ≤ 10, the solution is 600 ≤ x ≤ 800. A: the market price of mung bean should be between 600 tons and 800 tons