已知指数函数f(x)=ax(a>0,且a≠1)自变量与函数值的部分对应值如下表:
则a= ;若函数y=x[f(x)-2],则满足条件y>0的x的集合为 .
0 92137 92145 92151 92155 92161 92163 92167 92173 92175 92181 92187 92191 92193 92197 92203 92205 92211 92215 92217 92221 92223 92227 92229 92231 92232 92233 92235 92236 92237 92239 92241 92245 92247 92251 92253 92257 92263 92265 92271 92275 92277 92281 92287 92293 92295 92301 92305 92307 92313 92317 92323 92331 266669
| x | -1 | 2 | |
| f(x) | 2 | 1 | 0.25 |