本次数学考了Linear function,quadratic function, the discriminant of quadratic function, long division, exponential growth, the standard equation of circle, similar triangle, Pythagorean theorem
回顾一下数学真题:
1. Function
(1) Given the relation of the distance and the time, find the average speed.
(2) Given two functions f(x) ,g(x), w(x)=f(x)+g(x), and a input-output table, find the w(x)=x.
2. Linear function
(1) Interpret the slope and intercepts.
(2)Solve the linear equation
3. Quadratic function
(1) Determine the number of solutions by using the discriminant
(2)The shape of the graph of a quadratic function (open upward or open downward; the vertex)
(3) Find a model to best fit the scatterplot.
(4)The addition of complex number
4. Rational function
Change the the rational function into the mixed fraction by using the long division.
5. Mixture
Two bottles of solution with different concentration are mixed. Given the concentration of two bottles of solution, the concentration of the mixed solution, and the volume of one kind of solution, find the volume of the other kind of solution.
6. Statistics
(1) There are two rows of numbers but one is missing. Given the mean of them, find the missing value.
(2)Given the percentage of students, teachers and parents in a school and the number of administrators, find the difference of teachers and parents. (Find the total number and then times the difference of percentage)