2010 年

If $x=\dfrac{3a}{a+2b}$, then $a=$

$\left(\dfrac{1}{9}\right)^{500}\left(3^{500}\right)^3=$

$\dfrac{1}{2x-3}+\dfrac{1}{2x+3}=$

$ab+ac-a^2-bc=$

If $h$ and $k$ are constants such that $hx+(x-3)^2\equiv x^2+10x+k$, then

If $f(x)=x^2-3x+17$, then $3f(2)-1=$

Let $x$ be the larger one of two consecutive odd numbers. If the sum of the squares of the two odd numbers is less than four times the product of the two odd numbers by $2$, then

If $2p+q=p-q=3$, then $q=$

The equation of the quadratic graph shown in the figure is

Let $k$ be a constant. Find the range of values of $k$ such that the quadratic equation $x^2+6x+k=3$ has no real roots.