2008 年

$\left(\dfrac{1}{2}\right)^{888}(-2)^{887}=$

If $m=7-3n$, then $n=$

$\dfrac{-k}{1-k}-\dfrac{1}{k-1}=$

$(2x^2-3x+1)-2(x^2+2x-1)=$

Which of the following must have $x+y$ as a factor? I. $x^2-y^2$ II. $x^2+y^2$ III. $x(x+y)-x-y$

Let $\mathrm{f}(x)=x^2+kx+7$, where $k$ is a constant. If $\mathrm{f}(4)-\mathrm{f}(3)=21$, then $k=$

In the figure, the rectangle $ABCD$ is divided into eight identical rectangles. Find the area of the rectangle $ABCD$.

If $m+2=n-1=3m+n-46$, then $n=$

The figure shows the graph of $y=-(x+h)^2+k$. Which of the following must be true?

The figure shows the graph of $y=\mathrm{f}(x)$, where $\mathrm{f}(x)$ is a quadratic function. The solution of $\mathrm{f}(x)<3$ is