Question

найдите область определения функции y=корень 2х+3 *корень х-1

Answer 1

$y= sqrt{2x+3} *sqrt{x-1} \\ left { {{2x+3 geq 0} atop {x-1 geq 0}} right.\\ left { {{2x geq -3} atop {x geq 1}} right. \\ left { {{x geq -1,5} atop {x geq 1}} right. \\x geq 1\\xin[1;+infty)$