Question

найдите область определения функции y=lg(x+2)+lg(x-1)

Answer 1

$y=lg(x+2)-lg(x-1)\\OOF:; ; left { {{x+2 textgreater 0} atop {x-1 textgreater 0}} right. ; ; left { {{x textgreater -2} atop {x textgreater 1}} right. ; ; Rightarrow ; ; ; x textgreater 1\\xin (1,+infty )$