If the function f (x) = ax + 2 (a > 0 and a is not equal to 1) passes through a (2,6), then f (3) =?

If the function f (x) = ax + 2 (a > 0 and a is not equal to 1) passes through a (2,6), then f (3) =?

The function f (x) = ax + 2 (a > 0 and a is not equal to 1)
f(2)=a*2+2=6
2a=4
a=2
f(x)=2x+2
f(3)=2*3+2=8

It is known that the function f (x) = cube of X + square of AX + 3bx + C (B is not equal to 0), and G (x) = f (x) - 2 is an odd function. Find the monotone interval of function f (x)

(1) G (x) is an odd function, so g (x) + G (- x) ≡ 0f (x) - 2 + F (- x) - 2 ≡ 02ax ^ 2 + 2c-4 ≡ 0ax ^ 2 + C ≡ 2, so a = 0, C = 2 (2) f (x) = x ^ 3 + 3bx + 2F '(x) = 3x ^ 2 + 3B = 0 = = > x = ± √ (- b) in (- ∞, - √ (- b)) and (√ (- b), + ∞), f' (x) > 0, so f (x) is an increasing function, in (- √ (- b)

The resistance of an electric furnace is 100 ohm, and the heat generated after 10 seconds is 4 × 10 ^ 3 joules. Then, what is the current intensity through the electric furnace?

W=I^2*R*t=I^2*100*10=4×10^3
I=2A

Do not apply 30 questions to the exercises of the equation of one degree with one decimal

1. In the equation 3x2-5 = x, its unknowns are______ The constant term is______ ．
4. In x =______ The difference between 7 times of X and 3 is 5
5. If 2x = - 4, then x = -______ If - 13X = 13, then x = -______ If - 9x = 63, then x = -______ ．
7. If - 0.8x = 1, then x = -______ If 30% x = 5, then x =______ ．
13. If x + 2m = 8 and the solution of equation 4x-1 = 3 are the same, then M =______ ．
19. Given m + 4-N + (n-2) 2 = 0, then M = 0______ ,n＝______ ,m2－n2______ ．
20. The solution of the equation-3 (a + y) = A-2 (Y-A) for y is______ ．
21. The solution of the equation AX = B, (a ≠ 0) is______ ．
22. Equation (M + 2) 2 + n-1 = 0, then 3m-5n = 0______ ．
23. If the solution of equation 2mx-m + 2 = 0 is x = 1, then M = 0______ ．
The root of is x =______ ．
27. If a two digit number can be expressed as 10m + n (where m and N are natural numbers not greater than 9), then the number in its single digit is 10m + n______ The number on the ten is______ ．
When m = 4, the solution of the equation is______ ．
29. For a project, if Party A works alone for 3 months and Party B works alone for 4 months, then the cooperation between Party A and Party B is necessary______ It will be finished in three months
30. To prepare 300 g 10% solution, 98% solution x g is needed, then the equation is given______ ．
2、 Judgment questions (mark "√" for right and "×" for wrong)
1. An equation is an equation, but an equation is not necessarily an equation
2.5 (x + y) = 10 is an equation, but it is not a linear equation
3. The equation 3x-5 = X-2 has no solution in the range of natural number
4. The solution of equation 4x = 3x + 3 is the same as that of equation 3x-4x = 3
7. The solution of x-3 = 1 is x = 4 or x = 2
（ ）
The solution of 9.3x-7 = 3x + 1 is x = 0
3、 The equations are listed according to the following conditions
40% of 10. X is equal to 25% of the sum of X and 20
4、 Multiple choice questions
1. The following expressions are algebraic and are []
C．x2＝0 D．a＋b＝b＋a
2. The following equation is a linear equation with one variable, and is []
C．5x－1＝3（x＋2） D．y2＝16
3. In the following groups of equations, the same solution is []
A. 0.5x + 0.3 = 0.9 and 0.5x-0.9 = 0.3
C. X = 3 and x = 3
D. X + (x + 1) = 2x and X + 1 = 2
A．m＝1 B．m＝2 C．m＝3 D．m＝4
6. If - 3A = 3b, then a is equal to []
A．－b B．b
C．3b＋3 D．3b－3
7. According to the quantitative relationship of "the difference between three times of B and the absolute value of - 4 is equal to 9", we can get the equation []
A．｜3b－（－4）｜
B．｜3b－4｜＝9
C．3｜b｜－｜－4｜＝9
D．3b－｜－4｜＝9
8. In the following equation, the solution is x = 2
①4x－8＝0 ②4x＋8＝0
③8x－4＝0 ④2x－4＝0
A. 1 B.2 C.3 D.4
A．x＝3.6 B．x＝0.36
C．x＝36 D．x＝0.036
A．4（x＋5）＝2－3（2x－7）
B．4x＋20＝24－6x－21
C．4x＋5＝2－6x＋21
D．4x＋20＝24－6x＋21
11. Given that x = - 2 is the solution of the equation a (x + 1) = 2A (x-1) + 5, then a is equal to []
A．1 B．1 C．0 D．5
12. In the following equation, the equation whose solution is x = - 3 is []
14. The solutions of the two equations in the following groups are the same []
A. 3x-2 = 10 and 2x-1 = 3 (x + 1) x
B. 4x-3 = 2x-1 and 3 (1-x) = 0
D. - 4x - 1 = x and 5x = 1
15. The following equation is correct []
A. From 2x-3 (4-2x) = 6, 2x-12-2x = 6
B. From 2x-3 (4-2x) = 6, 2x-12-6x = 6
C. From 2x-3 (4-2x) = 6, 2x-12 + 6x = 6
D. From 2x-3 (4-2x) = 6, 2x-3 + 6x = 6
17. The equation with x = - 2 as root is []
C．0.5x＋1＝2（x－1）＋6
D．x2－1＝x－1
18. In the following formulas, the equation of first degree with one variable is []
①x－1＝4x ②5（x－1）＝0
③x2－5x＝2x2＋1 ④6＝x＋6
A. 6 B.5 C.4 D.3
The unknown a is equal to []
1．3－x＝4 （x＝1,x＝－1）
2．（x＋5）（x－3）＝0 （x＝－5,x＝3,x＝0）
3x-7 = 3x + 5 (x = 0, X can take any rational number)
6．｜x｜＝5 （x＝5,x＝－5,x＝±5）
6、 Which of the following equations have the same solution?
7、 Solve the following equation
8、 Solve the following equation
1．2（x－3）＋3（2x－1）＝5（x＋3）
3．3（y－1）＋2（1－y）＝4＋5（y－1）
4．2（x－5）＋（x－4）＝3（2x－1）－（5x＋3）
9、 Solve the following equation
10、 Solve the following equation
11、 Solve the following equation
12、 Solve the following equation
1．｜x－4｜＝10 2．4｜x－3｜＝12
3．｜x｜－7＝－5 4．｜2x－1｜＋3＝8
13、 Answer questions
1. Solve the equation MX = n about X
2. Solve the equation x + 3 + X-5 = 10
The polynomial x 2-2kxy-3y 2 + 3xy-x-y does not contain the product terms of X and y when k is a value
4. If 2x + 3 + (x-3y + 4) 2 = 0, find the value of (Y-1) 2 + x2
5. Given that the value of the algebraic formula 2x2 + 5x + C is 14 when x = 2, find the value of the algebraic formula when x = - 2
6. If 2 (x-3) - (3x + 4) = 5, find the value of X
7. We know that [5x-2 (x-3)] 2 + 3Y + 6 = 0, and prove that x = y
The equation kx2-12x-3 = 0 has a root of 1
11. When m and n take what value, the binomial 2a2bmc3n-1 and 6a2bc2m + 3 are of the same kind?
13. The solution of the equation x = a + 1 and 2 (x-1) = 5a-6 is the same
The value of
15. Given that x = - 2 is the solution of the equation 2 | X-1 | - 3 | m | = - 1, find the value of M
16. When k is an integer, the solution of the equation 2kx-4 = (K + 2) · x is a positive integer?
When x is 17, the sum of the algebraic formula 5x-8 and 3x + 7 is the reciprocal of 0.5
19. If a ≥ 0 and the solution of the equation a + 2x = 2 is a natural number, what is the value of a?
21. A three digit number is 320. If the number on the hundred digit is (M + n-p), the number on the ten digit is (m-n), and the number on the single digit is (n + 1), what are the values of M, N, and P?
22. When the equation B (X-B) - C (x-C) = 0 of X has a unique solution, what conditions should b and C satisfy?
23. When determining the value of a, the solution of equation a (2x-1) = 3x-2
(1) Is a positive number; (2) is 0; (3) does not exist
What is the value when the equation has no solution?
25. It is known that - 6x2 + (a + b) x-C = 2bx2-2x-c is the identity of X, and the equation is solved
14、 Solve the following equation about X

What are the English signs in public places

1. Business hours 2, office hours 3, entrance 4, exit 5, push 6, pull 7, shut 8, on 9, off 10, open 11, pause 12, stop 13, close

Exercise: write about the problems in your life and how to solve them
More than 300 words

My childhood is colorful, in my childhood flowing with innocence and sweetness, always make people have unforgettable memories
I remember when I was 5 years old, I was playing freely in my room on a sunny spring Sunday. Suddenly, there was a "buzzing" noise from the hall. I heard it and rushed over. I saw my father sitting on the sofa, putting up his legs and shaving with a strange shape in his hand. I opened my eyes wide and asked my father, "Dad, "What is this?" "Oh, you ask me that, right? This is my little assistant who helps my father shave!" as soon as the voice came out, my father shaved his beard with a smile and a smile. That's really enviable. I stood there, thinking
The next morning, when I got up, I found that my little white dog had several long moustaches on his mouth. My eyes suddenly brightened: Hey, help the dog with his father's "super weapon" to clean up his "hairstyle". I danced for my cleverness. I said I would do it. I looked around and felt very safe, so I took action, I crept to my father's room. Ha, I found the strange thing without any effort. I jumped and jumped, not to mention how happy I was! When I came to the yard, I grabbed the little white dog and shaved his beard no matter what happened. I was very happy when I looked at my masterpiece and thought: my parents will praise me when they come back
As night fell, my mother finally got off work. I told my mother what happened today. After listening to this, my mother was so embarrassed by my innocent behavior that I couldn't understand it. My mother said to me earnestly, "a dog's beard is a great help to him. You can't cut it casually. When you grow up, you will find out the information by yourself."
With the passage of years, this is a note in my heart that once let me savor. Whenever I think of it, I always laugh. This is also a "diary" full of joy in my heart

How to convert kilowatt hour to watt hour

These two units cannot be converted. Kilowatt hour is the unit of energy and watt is the unit of power
1kwh = 1000W * 3600s = 3600000j

Men's football in a middle school