题目

已知点P(－l，4)在反比例函数的图象上，则k的值是(    )A．B．C．4 D．－4 答案：D解析:略0.9×6=0.42÷7=7×0.08=1÷0.2=8.4÷2.1=4×0.25=60×0.08=1.26÷O.6=0.9×100÷1000=0.1÷0.001×0.1=0.5×0.1÷0.5×0.1=