If we know the third power of X of one third of the function f (x) minus half of m plus one, we can get the square of X and get the maximum value at x = 1

2. It is known that the function y = x to the third power plus a times the square of X + BX + 27 has a maximum at x = - 1. In the first question of x = y '= 3x 2; - 6 is the maximum f (√ 2) according to the image f (- √ 2)

The system of linear equations with three variables in the first grade of junior high school
3x+7y+z=3.15 4x+10y+z=4.2
Solve the common solution of the two equations
(there must be a process)
What I want is a way to represent two other unknowns with one.

Let 3x + 7Y + Z = 3.15 be ①
4X + 10Y + Z = 4.2 is ②
① X + y + Z = 1.053
① - 3 is 2x + 6y = 2.1
② - 3 x + 9y = 3.15
The solution is x = 1.05-3y
z=2y
So the common solution is determined by the value of Y
For example, when y = 1, x = - 1.95, z = 2

In this paper, we give a series of numbers: 1, - 3.5, - 7.9, - 11 What are the last three numbers? What is the number 2008?

1,-3,5,-7,9,-11,13,-15,17……
That's 13, - 15, 17
The rule is an = [(- 1) ^ n + 1] × (2n-1)
∴a2008=-(2×2008-1)=--4015

What is the degree of the coefficient of the third power y of negative third x

The coefficient of y to the third power of minus one third x is - one third
Four times

How to solve a problem with a denominator in a linear equation of one variable, such as 3-2 / 5 x = 15. Do we need to multiply the least common multiple on both sides of the equal sign to get the denominator

5x divided by 3-2 equals 15
5x is 15 times (3-2)
5X=15
X=3

Arrange the positive integers according to the rule shown in the figure. If the ordinal number pair (n, m) is used to represent the n-th row, and the m-th number from left to right, such as (4, 3) to represent the number 9, then what is the number represented by (7, 2)?

According to the law revealed in the figure, 1 + 2 + 3 + 4 + 5 + 6 = 21, so row 7; from left to right, from small to large, starting from 22, the second should be 23, so (7,2) means 23. Answer: (7,2) means 23

Integers with absolute values greater than two and less than five are

3,4,-3,-4

All the knowledge points of primary school mathematics should be detailed

The commonly used quantity relations are as follows: 1. Quantity per copy × quantity per copy = total number △ quantity per copy = total number of copies △ quantity per copy = number of copies 2. 1. Multiple × multiple = several multiples △ 1. Multiple = several multiples △ multiple = 1. 3. Speed × time = distance △ speed = time distance △ time

The ratio of the number of small balls in the two boxes is 4:1. If seven small balls are taken from box a and put into Box B, the ratio of the number of small balls between box a and Box B will change
Change to 5:3, find the total number of balls in two boxes
No equations

12345677890

The area of a tile is about 60 square decimeters, right?

60 square decimeter = 0.6 square meter, now the floor tile for home decoration is 0.64 square meter

If we know the third power of X of one third of the function f (x) minus half of m plus one, we can get the square of X and get the maximum value at x = 1