共50条信息
已知\(\{a_{n}\}\)为等差数列,前\(n\)项和为\(S_{n}\),点\((n,a_{n})\)都落在直线\(y=kx+4-5k\)上那么\(S_{9}=\)
已知函数\(f\)\((\)\(x\)\()=\)\(x\)\(\ln \) \(x\),若直线\(l\)过点\((0,-1)\),并且与曲线\(y\)\(=\)\(f\)\((\)\(x\)\()\)相切,则直线\(l\)的方程为( )
进入组卷