First, multiple-choice questions:
Title number
1
2
three
four
five
six
seven
eight
nine
10
answer
B
C
A
B
C
C
A
A
C
C
Hint: 1, omitted
2. The original formula can be changed to: m( 1-m)=0, m=0 or m= 1.
3. What does △ BPP mean from the topic? Is an isosceles right triangle, and PP is obtained from Pythagorean theorem? =2
4. To solve these equations:
∵x & gt； 0，y & lt0
∴
Get 4
∴a=5.
5. When k>4 o'clock direction, 2k & gtk2 & gt2k & gtK+2, so choose C.
6. A quadrilateral obtained by connecting the midpoints of four sides of the quadrilateral in turn is a quadrilateral with an area of:
(
× 10)×(
×8)=20
7.s is positive =
Aortic second sound
S diamond =
Bc, ∫b:a = a:c, that is, a2=bc, ∴S is positive.
: s diamond
= 1: 1
8. Let the other two sides be A and B, then a2+b2= 1 12.
(irrelevant) or 1 12=
Aortic second sound
-
b2
=(a+b)(a-b)= 12 1
= 12 1× 1;
A and b are natural numbers.
∴a+b= 12 1，
∴ The circumference is121+1=132.
9.∫x2-9x+ 18 = 0, that is, (x-6)(x-3)=0.
, ∴x=6 or x=3, ∴ the three sides of the triangle are:
Three, three, three or six, six, six or six, six, three. Perimeter: 9 or 15 or 18.
10, omitted
Two. Fill in the blanks in Group A:
Tip:
1 1
Accelerated business collection and delivery system (adopted by the United States post office)
B.C.
//BM
The circumference is 12.
12.
Simplified as (a-b)(a+b-9)=0.
13. From the meaning of the question,
solve
14 AB=5.
BC= 12
15 is 7a+ 196=2 13.
a=
When b is the smallest.
A+b value is the largest.
That is, a+b=27.
16.
Draw a figure, which is composed of symmetry and equilateral.
The nature of the triangle can assume that the distance from f to BC is 4.
17
The sum of the outer angles of the polygon is 360.
, the outer corner is
,
Let the polygon be 360.
=
= 18 polygon
The sum of all integer solutions is 0+ 1+2+3=6.
18.
19 is set to 2=
a=2
20.
Five triangles
10 quadrilateral
five
Third, fill in the blanks in group B.
Hint: 2 1. The denominator is set to 2 (x-1)-5 (x+1) = m.
When x= 1
m=- 10
When x=- 1
m=-4
23. Set the first book as X yuan.
The second x+700 yuan
Solution: x=3800
x+700=4500
A: The first book costs 3,800 yuan.
The second one is 4500 yuan.
24. From the meaning of the question.
solve
Or (
)
Or (-2,0)
The analytical formula is y=
Or y=
25. 1 1; 3 1