A
anlebinhtam


1.CMR : x^4 - 2x + 2 > 0 \forallx =((
and!
2.ca ma ra (cmr) : x^4 + 2x^3 + 4x^2 +2x +1 > 0 \forallx o-+
THANKS ZIEU
End !!!
>-
and!
2.ca ma ra (cmr) : x^4 + 2x^3 + 4x^2 +2x +1 > 0 \forallx o-+
THANKS ZIEU
End !!!