ans
22106
$1$


22107
$\pi$


22108
$(\dfrac{3}{5}, \frac{4}{5})$


22109
$-\dfrac{4}{5}$


22110
$-\dfrac{3}{5}+\dfrac{4}{5} \mathrm{i}$


22111
$(1, \dfrac{7}{3})$


22112
$-\dfrac{29}{48}$


22113
$y=-3 x+4$


22114
$2$


22115
$12$


22116
$[-2,2) \cup\{2 \sqrt{2}\}$


22117
$[-\sqrt{3}+1, \sqrt{3}+1]$


22118
A


22119
C


22120
C


22121
A


22122
(1) $\dfrac{\pi}{2}$; (2) $x-2y+\sqrt{5}+1=0$或$x-2y-\sqrt{5}+1=0$


22123
(1) $-1\pm \mathrm{i}$; (2) $\pm \sqrt{7}$或$\pm 3$


22124
(1) $\{x|x=k\pi \text{或}-\dfrac{\pi}{4}+k\pi, \ k\in \mathbf{Z}\}$; (2) $[\dfrac{3\pi}{8}+k\pi,\dfrac{7\pi}{8}+k\pi ]$, $k\in \mathbf{Z}$


22125
(1) $2$; (2) 值为$4$, 证明略; (3) $-2$


22126
(1) $Q_1(2,1)$, $P_2(0,1)$; (2) 存在, $k=0$, $t=0$, 证明略; (3) $f(z)=\dfrac{z-1}{z+1}$满足题意, 证明略