Question

Найдите область определения функции:
y=√(10-x)(x+21)

Answer 1

$y= sqrt{(10-x)(x+21)} \(10-x)(x+21) geq 0\(x-10)(x+21) leq 0\1)y=(x-10)(x+21)\2)y=0,x=10,x-21\+++[-21]---[10]+++ textgreater x\D=[-21;10]$