已知\(f\left(x\right)=2\left|x-2\right|+\left|x+1\right| \)
\((\)Ⅰ\()\)求不等式\(f\left(x\right) < 6 \)的解集;
\((\)Ⅱ\()\)设\(m\),\(n\),\(p\)为正实数,且\(m+n+p=f\left(2\right) \),求证:\(mn+np+pm\leqslant 3 \).
进入组卷