(7 / 3) to the power of 1998 * (7 to the power of 2000 + 35 to the power of 2000 + 3 / 3 to the power of 2000 + 15 to the power of 2000)

(7 / 3) to the power of 1998 * (7 to the power of 2000 + 35 to the power of 2000 + 3 / 3 to the power of 2000 + 15 to the power of 2000)

A project can be completed in 144 days by Party A alone. Now team a will construct for 2 days first, and then team B will join in the construction. After 4 days of cooperation, the two teams will be transferred to team C for construction. After 8 days of joint construction, the three teams have completed one third of the whole project. After 16 days, five sixth of the whole project has been completed before and after. The rest of the project will be constructed by team C alone, How many days will it take to finish the whole project?

The efficiency of ethylene and propylene is set as X, y respectively
2/144 + 4(1/144 +x) ＋8（1/144 + x + y ）=1/3
16（1/144 + x + y ）=5/6 - 1/3=1/2
x=1/96
y=1/72
There's a sixth left
1 / 6 △ 1 / 72 = 12 days

P is any point in the equilateral triangle ABC, PD ⊥ BC in D, PE ⊥ Ca in E, PF ⊥ AB in F, then what is the value of (PD + PE + PF) / (BD + CE + AF)? It is better to have a process

Because PD, PE and PF are perpendicular to BC, AC and ab. triangle ABC is equilateral triangle, so point P is perpendicular. It connects AP, BP and PF CP.CE=1/2BC=BD Similarly, CE = BD = AF, let the side length of equilateral triangle be 1. Then BD + CE + AF = 3 / 2tg ∠ PBC = Pd / BD, so PD = PE = PF, root of 6, so PD + PE + PF) / (BD + CE +

The value of the fourth power of x plus the fourth power of Y
x. Y is two parts of the equation 2x ^ 2-x-3 = 0. Solve the equation and find the fourth power of x plus the fourth power of Y

The quartic power of x plus the quartic power of y = (X & # 178; + Y & # 178;) &# 178; - 2x & # 178; Y & # 178; = ((x + y) &# 178; - 2XY) &# 178; - 2x & # 178; Y & # 178; is brought into vedaco

Summary of knowledge points of mathematics in Volume 2 of Grade 7
Every chapter, formula and theorem, thank you

In general, it is the first chapter of integral operation 1. Integral 1. Monomial 1. An algebraic formula composed of the product of numbers and letters is called a monomial. A single number or letter is also a monomial. 2. The coefficient of a monomial is the numerical factor of the monomial. As the coefficient of a monomial, it must be accompanied by the property symbol in front of the number

The red ball is 2 / 3 of the white ball. When the white ball is used, what is the percentage of the red ball? What is the percentage of the red ball in the total

When the ball is white, 2 / 3 of the red ball = 3 / 2
The red ball accounts for 2 (3 + 2) = 2 / 5 of the total
[I hope I can help you. I wish you progress in your study. If you don't understand, please ask. If you understand, please adopt it in time! (*^__ ^*)】

How much is 1 ml water

The correct answer is 0.001l

At the end of the mid-term examination, the average score of Xiaohong's Chinese and mathematics is 94. The average score of Chinese, mathematics and English is 94. How much is the English test

English = 94 × 3-94.5 × 2 = 93 points

The sum of three consecutive even numbers is 12 times more than the largest even number among them______ 、______ 、______ ．

Let the largest one of the three consecutive even numbers be X. according to the meaning of the question, we get: x + X-2 + x-4 = 2x + 12, & nbsp; & nbsp; & nbsp; & nbsp; 3x-6 = 2x + 12, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; X = 18, 18-2 = 16, 18-4 = 14; answer: these three numbers are 14, 16, 18. So the answer is: 14, 16, 18

How many liters of diesel is one kilogram of diesel

Usually, the density of diesel oil is calculated as 0.84, so a kilogram of diesel oil is about 1.19 liters