5.解分式方程$\frac{1}{x-1}+1=0$,正确的结果是( )
| A. | x=0 | B. | x=1 | C. | x=2 | D. | 无解 |
4.下列计算中,正确的是( )
| A. | (a3)4=a12 | B. | a3•a5=a15 | C. | a2+a2=a4 | D. | a6÷a2=a3 |
2.点(2,-4)在反比例函数y=$\frac{k}{x}$的图象上,则下列各点在此函数图象上的是( )
| A. | (2,4) | B. | (-1,-8) | C. | (-2,-4) | D. | (4,-2) |
17.下列计算正确的是( )
0 284166 284174 284180 284184 284190 284192 284196 284202 284204 284210 284216 284220 284222 284226 284232 284234 284240 284244 284246 284250 284252 284256 284258 284260 284261 284262 284264 284265 284266 284268 284270 284274 284276 284280 284282 284286 284292 284294 284300 284304 284306 284310 284316 284322 284324 284330 284334 284336 284342 284346 284352 284360 366461
| A. | $\sqrt{8}$-$\sqrt{2}$=$\sqrt{2}$ | B. | (-3)2=6 | C. | 3a4-2a2=a2 | D. | (-a3)2=a5 |