Looking for the seventh grade mathematics midterm questions East China Normal University Edition

Looking for the seventh grade mathematics midterm questions East China Normal University Edition

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What is (- 27 △ 8) ∧ (- 2 △ 3) equal to

(－27÷8)∧(－2÷3)
=（—27）÷8∧(－2）÷3
=（—27÷3）÷[8÷（—2）]
=—9÷（—4）
=9÷4
=2.25

The scenery

Primary school grade 6 Volume 2 mathematics 55 page 10

First, the scale is 1:10000. Take Xiaoming's home as the coordinate, and use up, north, down, South, left, West, right and east to determine that the street park is 5cm to the left of Xiaoming's home. Take the street park as the coordinate, draw 3cm upward as the science and technology Museum, then take the science and Technology Museum as the coordinate, spend 10cm to the right as the zoo, and take the animal park as the coordinate, and spend 4cm downward as the hospital

If the solution of equation lnx-6 + 2x = 0 is a, then the largest integer solution of inequality x ≤ A is?

lnx－6+2X＝0,lnx=6-2x,x=e(6-2x),6-2x>0,6>2x,3>x,3>a

Let a = 1 / 2 by 3 / 4 by 5 / 6 by 7 / 8. By 99 / 100, compare the size of a and 1 / 10
Who can write it? I'm offering him 10 rewards to write the formula

Let a = 1 / 2 * 3 / 4 * 5 / 6 * 7 / 8 *. * 99 / 100
Let B = 2 / 3 * 4 / 5 * 6 / 7 * 8 / 9 *. * 100 / 101
Because 1 / 2

As shown in the figure, Mn is the diameter of ⊙ o, Mn = 2, ∠ amn = 30 °, point B is the midpoint of arc an, and P is the moving point on diameter Mn, then the minimum value of PA + Pb is ()
A. 22B. 2C. 1D. 2

Make a symmetric point C of point B with respect to Mn, connect AC with point P, then point P is the point to be made. At this time, PA + Pb is the smallest and equal to the length of AC. connect OA, OC, according to the meaning of the title, the degree of arc an is 60 °, then the degree of arc BN is 30 °, according to the vertical diameter theorem, the degree of arc cn is 30 °, then ∠ AOC = 90 ° and ∵ OA = OC = 1, then AC = 2

With the rapid development of computer technology, the price of computer is constantly decreasing. After the original price of a brand of computer is reduced by M yuan, the price is reduced by 20%. Now the price is n yuan, so the original price of the computer is______ Yuan

Suppose the original price of the computer is x yuan, then (x-m) (1-20%) = n, the solution is x = 54n + M. so the original price of the computer is 54n + m yuan. So the answer is: 54n + M

Find the domain of definition, range of value and monotone interval of function y = 2 ^ (X & # 178; - X-6)

The domain of solution 1 is r
2 range y = 2 ^ (x ^ 2-x-6)
=2^[(x-1/2)^2-25/4]
≥2^[-25/4]
So the range of function {Y / Y ≥ 2 ^ [- 25 / 4]}
Increasing interval [1 / 2, positive infinity]
Minus interval (negative infinity, 1 / 2)

Senior high school mathematics compulsory 3 (PEP)
What's wrong with the programming in the first section? Why sometimes s takes 0, sometimes s takes 1, sometimes s goes to 2... I is the same situation. What's wrong with the values of S and I? Is there any way to do this kind of program?

(1) The first value is the initial value, according to the corresponding procedure to give the assignment, such as s = S + 1 how to understand
The old s after the equal sign plus 1 becomes the new s use
(2) Why sometimes s takes 0, sometimes s takes 1, sometimes s goes to 2... It's just different initial values in different environments
(3) It's not difficult to understand this kind of diagram step by step along the process. Although there are sentence structures like this and that, it's easy to say as long as you understand it. It's not difficult to investigate the college entrance examination