曲线在点(0,-1)处的切线方程为 ________.
暂无解析
设f(x,y)在点(0,0)附近有定义,且,则
Night________(fall),wehurriedhome.
已知,二次型的秩为2,(I)求实数a的值;(II)求正交变换x=Qy将f化为标准形.
Matteristhename________(give)toeverythingwhichhasweightandoccupiesspace.
设数列收敛,则()