4.
下列结论不正确的是( )
\(①.\dfrac{1}{{{2}^{10}}}+\dfrac{1}{{{2}^{10}}+1}+\dfrac{1}{{{2}^{10}}+2}+\cdots +\dfrac{1}{{{2}^{11}}-1} > 1\)
\(②.\)若\(|a| < 1\),则\(|a+b|-|a-b|\ > 2\)
\(③.\lg 9\cdot \lg 11 < 1\)
\(④.\)若\(x > 0,y > 0\),则\(\dfrac{x+y}{1+x+y} < \dfrac{x}{1+x}+\dfrac{y}{1+y}\)