Решение неравенства √20-x>√x+1=

Question

Решение неравенства √20-x>√x+1=

Answer 1

{20-x≥0⇒x≤20
{x+1≥0⇒x≥-1
x∈[-1;20]
20-x>x+1
2x<19<br>x<9,5<br>x∈[-1;19,5)