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190321
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$$y=a(x-h)^2-k.$$a=?
1: The functional image goes through (-3,0) and (1,0).
2: The functional image goes through (-1,4) and $$y \leq 4$$.
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190310
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What is the unit digit number of ?
1: k can be divided by 10.
2: k can be divided by 4.
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190310
|
$$B_n=A_{n+1}-A_{n},B_{n+1}-B_{n}=2$$.$$A_{10}$$=?
1: $$A_1=1,A_3=3$$
2: $$A_2=2,A_4=4$$
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190113
|
x, y, and z are consecutive integers. 0 < x < y < z. Is xz even?
(1) xy is even.
(2) xyz is divisible by 4.
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190207
|
$$a_1$$=56,$$a_2$$=57,$$a_3$$=59 .$$a_n$$=5n+$$a_{n-3} $$ (n≥4) Which of the following numbers belong to the sequence {$$a_n$$}?
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190603
|
The number of a bacteria triples every 30 minutes, how many times the number of the bacteria after 4 hours is the number of bacteria after 2 hours?
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190215
|
Two numbers are chosen from the sequence {1,2,3,4,5}. What is the probability that the product of the two numbers is less than 4?
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191031
|
One person is prepared to complete 4 tasks, named, A,B,C,D . How many different ways can A be completed before B?
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191031
|
A composition is 96 pounds and contains W, X, Y, Z, where W:X:Y = 1:3:4, Y:Z = 5:2. how many pounds Y is?
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191031
|
$$
f ( n ) = \frac { 4 x ^ { 2 } - 1 } { 1 - 2 x } , \frac { f ( \sqrt { 3 } ) - f ( \sqrt { 2 } ) } { \sqrt { 3 } - \sqrt { 2 } } = ?
$$
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191031
|
If $$f ( x ) = \frac { 4 x ^ { 2 } - 1 } { 1 - 2 x } $$,then $$\frac { f ( \sqrt { 3 } ) - f ( \sqrt { 2 } ) } { \sqrt { 3 } - \sqrt { 2 } }$$?
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191222
|
It is defined that x@y=ax+by, what is the value of 8@2=?
1:4@1= 9
2:2@2= 6
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191222
|
The sum of the squares of the first n positive integers is a multiple of 4, what is n likely to be?
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190302
|
y=-|a-x|+b. What is the area of the graph of this function above the x axis?
1:b=4
2:ab=8
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191222 730高分节-数学测试
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It is known that: 1^2+2^2+3^2+....+ 10^2=n, so 2^2+4^2+6^2+..8^2+...+18^2+ 20^2=?
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190124
|
What is the unit digit number of $$2^{k}$$ ?
1: k can be divided by 10.
2: k can be divided by 4.
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190207
|
1+x+$$x^{2}$$+$$x^{3}$$+$$x^{4}$$ < $$\frac{1}{1-x}$$? x≠1
1:x < 1
2:x > 0
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OG19 OG20 OG2022
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In the xy-coordinate plane, if the point(0, 2)lies on the graph of the line 2x+ky =4, what is the value of the constant k?
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What is the value of $$({x}-{y})^{4}$$?(1)The product of x and y is 7.(2)x and y are integers.
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If $$\frac{x}{2}=\frac{3}{y}$$,is x less than y?(1)$${y}\ge{3}$$(2)$${y}\le{4}$$
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