A_____is a person who is in someone's home by invitation,for a short time,as for a meal,or to stay one or more nights.( )
boss
customer
guest
已知函数,函数,则函数的零点的个数为( )
阅读下边的程序框图,运行相应的程序,则输出i的值为( )
设是首项为,公差为的等差数列,为其前n项和,若成等比数列,则=( )
设变量满足约束条件则目标函数的最小值为( )
函数在区间上的最小值是( )