Senior one mathematics summer homework answer book 1
fill-in-the-blank question
1.252 degrees 90 degrees 18 degrees
2. 16 15.5
3. 1.06
4.6 1240
5.2020%76.5~~85.5
Multiple choice
6A
7A
8A
9C
10C
answer the question
1 1.*** donated 9355.4 yuan.
Each person donated 6.452 yuan.
12.*** 100 people were investigated.
Others account for 36 degrees.
Tuloue
13.X=5Y=7
A=90B=80
14. According to the average score, small admission.
According to the proportion, Xiaoping accepted it.
Senior one mathematics summer homework answer daquan 2
Multiple choice
CCCCD
fill-in-the-blank question
6. Square
7.5 cm
8. 16 root number 15 (weird answer. )
9. In the title, the upper bottom is changed to the lower bottom, 6CM.
10. Root number 2
answer the question
1 1. The condition of addition is AC=BD.
12. 1)
2)C drill = 24cm
13.s trapezoid = a 2
When 14. T=6, quadrilateral is parallelogram.
When T=7, the quadrilateral is an isosceles trapezoid.
Senior one mathematics summer homework answer daquan 3
1.62.- 1/x 4y3。 (-1, 6) 4.y = 1/x5.x is greater than or equal to -3 and not equal to 1/2.
6.-3/47.M & lt2/38.95 degrees 9.1012 or 411.910/.
Multiple choice
13.B 14。 A 15。 D 16。 B
17.B 18。 B 19。 A20.C2 1。 B22.B
answer the question
23. 1/2 1/524.A=-425。 Y= 1/X
26.30cm 27 . a b+AC & gt； 2AD (double length advertisement)
28. when x >, y = x+1y = 2/x; +0 or -2Y2 at 65438 x
The median of 29.7.5
B mean 7, median 7.5
Hit more than nine rings three times.
Senior one mathematics summer homework answer daquan 4
1. The function f(x)=x2-4x+2, and the minimum value of x∈ is _ _ _ _ _ _ _ _.
Analyze f(x)=(x-2)2-2 and make a diagram.
f(x)max=f(-4)=34。
Answer -2, 34
2. It is known that f(x) and g(x) are given in the table below.
x 1234f(x)432 1
X 1234g(x)3 142 and then f (g (3)) = _ _ _ _ _ _.
The analysis results show that g(3)=4 and f(g(3))=f(4)= 1.
Answer 1
Second, solve the problem (each small question 10, ***20)
3. Given that the image of function f(x) is two line segments (as shown in the figure, with no end point), find f 。
The analysis is known from the image.
f(x)=，
∴f=- 1=-，
∴f=f=-+ 1=
4. Given the function f(x)=x2+2x+a, f(bx)=9x2-6x+2, where x∈R, a and b are constants, find the equation.
The solution set of f(ax+b)=0.
Analysis: f (x) = x2+2x+a,
∴f(bx)=(bx)2+2(bx)+a=b2x2+2bx+a.
And ∵f(bx)=9x2-6x+2,
∴b2x2+2bx+a=9x2-6x+2
That is, (b2-9)x2+2(b+3)x+a-2=0.
∵x∈R, ∴, that is,
∴f(ax+b)=f(2x-3)=(2x-3)2+2(2x-3)+2
=4x2-8x+5=0。
∑δ=(-8)2-4×4×5 =- 16 & lt； 0,
What is the solution set of ∴f(ax+b)=0? .
The answer?
5.( 10) The pricing standard for taxis in a city is: within 4km 10 yuan, and no more than 4km18km 1.2 yuan/km, and more than18km 1.8 yuan/.
(1) If the waiting time cost is not included, the functional relationship between fare and mileage is established;
(2) If someone travels 20 kilometers by car, how much does he have to pay?
Analysis (1) if the fare is y yuan and the mileage is xkm, then according to the meaning of the question, y= 1.
When x=20,
y= 1.8×20-5.6=30.4，
That is, when driving 20km, you have to pay a fare of 30.4 yuan.
Senior one mathematics summer homework answer daquan 5
1. Let the set a = {x | 2 ≤ x < 4} and B={x|3x-7≥8-2x}, then A∪B is equal to ().
A.{ x | x≥3 } b . { x | x≥2 } c . { x | 2≤x & lt； 3}D.{x|x≥4}
2. Given the set A={ 1, 3,5,7,9} and b = {0,3,6,9, 12}, then A∩B= ().
A.{3，5}B.{3，6}C.{3，7}D.{3，9}
3. known set a = {x | x >；; 0}, B={x|- 1≤x≤2}, then A∪B= ()
A.{x|x≥- 1}B.{x|x≤2}C.{x|0
4. meet m? {a 1, a2, a3, a4}, set number M∩{a 1, a2, a3}={a 1, a2} is ().
A. 1B.2C.3D.4
5. Set A = {0 0,2, a}, B = {1, a2}. If A∪B={0, 1, 2,4, 16}, the value of a is ().
A.0B. 1C.2D.4
6.let s = { x | 2x+ 1 >； 0}，T={x|3x-5
A.？ B.{x|x}D.{x|-
7.50 students participated in two sports activities, A and B, and each student participated in at least one. There are 30 students in A and 25 students in B, so the number of students who only take part in one activity is _ _ _ _ _.
8. The number of all sets satisfying {1, 3}∪A={ 1, 3,5} is _ _ _ _ _.
9. Given the set A={x|x≤ 1}, B={x|x≥a}, and A∪B=R, then the value range of real number A is _ _ _ _ _.
10. Given the set A={-4, 2a- 1, a2}, B={a-5, 1-a, 9}, if A∩B={9}, find the value of a. 。
1 1. The known set A={ 1, 3,5}, B={ 1, 2, x2- 1}, if A ∪ B = {1.
12. It is known that A={x|2a≤x≤a+3} and B={x|x5}. If A∩B=? Find the range of a.
13.( 10) There are 36 students in a class who participate in extracurricular inquiry groups of mathematics, physical chemistry, and each student can participate in at most two groups. It is known that the number of participants in the math, physics and chemistry groups is 26, 15 and 13 respectively, and there are 6 participants in the math and physics groups at the same time.
(Set Analysis and Answer) 1. Analysis B={x|x≥3}. Draw a few axes (as shown below) and you will know that you can choose B to answer B.
2. Analysis A={ 1, 3,5,7,9}, B = {0,3,6,9, 12}, A and B have the same element 3,9, ∴A∩B={3,9}.
Answer d
3. Analytic sets A and B are represented by the number axis, as shown in the figure, A∪B={x|x≥- 1}. So choose a. answer a.
4. The analysis set M must contain the element a 1, a2, but not the element a3, so M={a 1, a2} or M={a 1, a2, a4}. So I chose B.
Answer b
5. Analysis ∫A∪B={0, 1, 2, A, a2}, a∪b = {0, 1, 2,4, 16}, ∴{a}
Answer d
13 136. analysis s = {x | 2x+1> 0 } = { x | x & gt-2，T={x|3x-5
Answer d
7. If X people participate in both events, (30-x) people only participate in the first event and (25-x) people only participate in the second event.
People. (30-x)+x+(25-x)=50, ∴x=5.∴ There are 25 people who only participate in item A and 20 people who only participate in item B,
There are 45 people who participated in only one activity. Answer 45
8. Analysis because {1, 3}∪A={ 1, 3,5}, then a? {1, 3,5}, at least one element in A is 5, so the remaining elements in A can be elements of a subset of the set {1, 3}, and {1, 3} has four subsets, so the number of A's that meet the conditions is 4. They are {5} and {653} respectively.
9. Analyze A=(-∞, 1] and B=[a,+∞). To make A∪B=R, a≤ 1 Answer a≤ 1 10. Analyze a.
When a=5, a = {-4,9,25} and b = {0 0,4,9}. At this time, a ∩ b = {-4,9} ≦ {9}. Therefore, a=5 is discarded.
When a=3, B={-2, -2, 9}, those that do not meet the requirements will be discarded. After investigation, a=-3 meets the meaning of the question.
1 1. Analyze x2- 1=3 or X2-66438+0} from A ∪ B={ 1}.
If x2- 1=3, then x = 2；; If x2- 1=5, then x =+/-;
To sum up, if x = 2 or when x = 2 and B={ 1, 2,3}, then A∩B={ 1, 3};
When x = b = {1, 2,5}, then A∩B={ 1, 5}.
12. the analysis is made by A∩B=? ,
(1) If A=? , there are 2A>A+3, ∴ A > 3.
(2) if A≦? , the solution is -≤a≤2.2 1.
To sum up, the value range of a is {a|- or a >；; 3}.2 1
13. The classmate who participated in mathematics alone is X, the classmate who participated in mathematical chemistry is Y, and the classmate who participated in chemistry alone is Z. According to the meaning of the question, x+y+6=26, y+4+z= 13, x+y+z=2 1, and the solution is X.
There are eight students taking part in mathematical chemistry at the same time.
A: There are 8 people in the math and chemistry groups at the same time.
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