共50条信息
计算
\((1){{(\sqrt{3}-\sqrt{2})}^{0}}-{{\left( -\dfrac{1}{2} \right)}^{2}}+{{2}^{-2}}-{{(-1)}^{3}}\) \((2)(\dfrac{1}{x-1}-\dfrac{1}{x+1})\div \dfrac{x}{2{{x}^{2}}-2}\)
\((2)\sqrt{48} ÷\sqrt{3} -2\sqrt{\dfrac{1}{5}}×\sqrt{30} +(2\sqrt{2} +\sqrt{3} )^{2\;\;}\)
\((1)\)计算:\({\left(- \dfrac{1}{3}\right)}^{-1}+{\left(2015- \sqrt{3}\right)}^{0}-4\sin 60^{\circ}+\left|- \sqrt{12}\right| \)
\((2)\)先化简,再求值:\(\left( \dfrac{1}{a+b}- \dfrac{1}{a-b}\right)÷ \dfrac{b}{{a}^{2}-2ab+{b}^{2}} \)
\((1)( \sqrt{3}- \sqrt{2}{)}^{2}-( \sqrt{3}+ \sqrt{2})( \sqrt{3}- \sqrt{2}) \); \((2)(x-\dfrac{4-x}{x-1})\div \dfrac{{{x}^{2}}-2x}{{{x}^{2}}-2x+1}\)
计算:
\((1)\dfrac{{{a}^{2}}-ab}{{{a}^{2}}}\div \dfrac{{{a}^{2}}-{{b}^{2}}}{ab}\); \((2)\dfrac{1}{a+1}-1+a\).
进入组卷