17.
如图,正方形ABCD的边长为5,AG=CH=4,BG=DH=3,连接GH,则线段GH的长为( )
| A. | $\sqrt{2}$ | B. | $\frac{4\sqrt{3}}{3}$ | C. | $\frac{8}{5}$ | D. | 5-$\sqrt{2}$ |
10.
如图所示,Rt△ABO中,∠AOB=90°,点A在第一象限,点B在第四象限,且AO:BO=1:$\sqrt{2}$,若点A(x0,y0)的坐标(x0,y0)满足y0=$\frac{1}{{y}_{0}}$,则点B(x,y)的坐标x,y所满足的关系式为( )
0 285236 285244 285250 285254 285260 285262 285266 285272 285274 285280 285286 285290 285292 285296 285302 285304 285310 285314 285316 285320 285322 285326 285328 285330 285331 285332 285334 285335 285336 285338 285340 285344 285346 285350 285352 285356 285362 285364 285370 285374 285376 285380 285386 285392 285394 285400 285404 285406 285412 285416 285422 285430 366461
| A. | y=$\frac{-2}{x}$ | B. | y=$\frac{-\sqrt{2}}{x}$ | C. | y=$\frac{-1}{x}$ | D. | y=$\frac{1}{x}$ |