Question

tim x biet :

(x^2+1).(3-x)<0

giai nhanh gium minh nha

 

Answer 1

        \(\left(x^2+1\right).\left(3-x\right)< 0\)

\(\Rightarrow\)  \(x^2+1\)và    \(3-x\)  trái dấu

Mà    \(x^2+1>0\)

nên    \(3-x< 0\)

\(\Leftrightarrow\)\(x>3\)

Vậy...

Answer 2

=)^x^²⁺¹⁼⁰hoac^3-x=0

^{=x^2=-1hoacx=3}

^{=)x=1hoac-1hoac3}