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191222
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P（X）=ax²+bx+c，a≠0，P(-1)=0，P(3)=0. Is P(5)>0？
Condition 1: P(0)=3
Condition 2: P(-4)-P(-3)<0
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191222
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One person works 12 yuan an hour, 35 hours at most, if she works more than 35 hours, the hourly wage will increase by 50%. She said that if she works 4 hours more this month, she will get 60 yuan more. How many hours did she work this month?
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191222
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X,y,z are consecutive positive integers and x < y < z，is x+y+z divisible by 10?
1：x+z is divisible by 10
2：y is divisible by 10
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191222
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Given that z is a positive number, what is the value of xz ?
1：xz=-3x
2：xz=3x
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191222
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$$\sqrt { 8 + \sqrt { 4 } 4 } * \sqrt { 8 - \sqrt { 44 } } =$$
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191222
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Here is a sequence of 9 numbers, and g(n) means the value of nth term. For example, for the nine numbers: 9 8 7 6 5 4 3 2 1, then g(7)=3, so what's the value of g(g(g(4)))?
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191222
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There are four objects marked 1, 2, 4, 7 in A pocket and other four objects marked 3, 5, 8, and 9 in B pocket. Let's take one object from A pocket and one from B. The probability of A >B is p, and the probability of A
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191222
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A team of 15 people is working on a project. They work 8 hours per day and have completed 1/4 of the total project in 18 days. How many additional people, each working at the same constant rate, will be needed to complete the rest of the project in 6 days?
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191222
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There are 10 pairs of socks of different colors and the two socks that are in pair are the same. Take out 12 socks from the ten pairs and what is the least number of socks in pairs of these 12 socks?
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191222
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There is a function: F(x)=y. If x and y are real numbers, and x+y=xy, which of the following is correct to describe the values of F(x) ?
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191222 还原机经选题: 数论&代数
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Known that -1 and 3 are the two roots of f (x) = ax ^ 2-bx + c, Is f(1)>0？
(1)f(0)=2
(2)f(-3)>f(-4)
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191222
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It takes 4.5 hours for car A to travel 270 miles and car B travels the same distance at a speed of 10 mile/h. How many hours less does it take for car A to travel the whole distance than car B?
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191222 730高分节-数学测试
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Is axy > bxy？
(1)ax > ay
(2)bx > by
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191222
|
A triangle with a length 6 for one of the sides is inscribed in a circle. Is the triangle a right triangle?
1: The other two sides of the triangle are equal
2: The perimeter of the circle is 6π
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191222
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DS: There are 5 different positive integers with a median of 55. What is the value of the largest number?
(1) The average of these 5 numbers is 52
(2) The sum of the smallest two numbers is 92, and the sum of the largest two numbers is
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191222
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PS: When a positive integer n is divided by 14 , the remainder is 2, what is the remainder when n is divided by 28?
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191222
|
$$\frac { 1 \frac { 1 } { 2 } } { 1 \frac { 1 } { 5 } } = x \times \frac { 1 \frac { 1 } { 5 } } { 1 \frac { 1 } { 2 } }$$
,What is the value of x?
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191222
|
$$\frac { x + 1 } { 1 - x } > 0 ?$$
(1)x>0
(2)x<1
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190215
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f(x)=a$$(x+h)^{2}$$+k.a=?
1：f(2)=2
2：f(-1)=-4,f(x) ≤ 4
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190215
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Which of the following meets the equation $$t^{4}$$-38$$t^{3}$$+72$$t^{2}$$=0?
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