Løs sqrt{(40+1/2)(2-1)}-(2/3-1)^-2:(1/5)^-1/(1-frac{1{4})^2}+frac{(frac{2-frac{1}{3}}{frac{3}{2}-1})^-2}{frac{frac{1}{2}-frac{2}{3}}{4-frac{2}{3}}}

$$\sqrt { ( 40 + \frac { 1 } { 2 } ) ( 2 - 1 ) } - \frac { ( \frac { 2 } { 3 } - 1 ) ^ { - 2 } : ( \frac { 1 } { 5 } ) ^ { - 1 } } { ( 1 - \frac { 1 } { 4 } ) ^ { 2 } } + \frac { ( \frac { 2 - \frac { 1 } { 3 } } { \frac { 3 } { 2 } - 1 } ) ^ { - 2 } } { \frac { \frac { 1 } { 2 } - \frac { 2 } { 3 } } { 4 - \frac { 2 } { 3 } } }$$

Evaluer

$$\frac{9\sqrt{2}}{2}-5\approx 1,363961031$$

Korte løsningstrin

Tilføj 40 og \frac{1}{2} for at få \frac{81}{2}.

$$\sqrt{\frac{81}{2}\left(2-1\right)}-\frac{\frac{\left(\frac{2}{3}-1\right)^{-2}}{\left(\frac{1}{5}\right)^{-1}}}{\left(1-\frac{1}{4}\right)^{2}}+\frac{\left(\frac{2-\frac{1}{3}}{\frac{3}{2}-1}\right)^{-2}}{\frac{\frac{1}{2}-\frac{2}{3}}{4-\frac{2}{3}}}$$

Subtraher 1 fra 2 for at få 1.

$$\sqrt{\frac{81}{2}\times 1}-\frac{\frac{\left(\frac{2}{3}-1\right)^{-2}}{\left(\frac{1}{5}\right)^{-1}}}{\left(1-\frac{1}{4}\right)^{2}}+\frac{\left(\frac{2-\frac{1}{3}}{\frac{3}{2}-1}\right)^{-2}}{\frac{\frac{1}{2}-\frac{2}{3}}{4-\frac{2}{3}}}$$

Multiplicer \frac{81}{2} og 1 for at få \frac{81}{2}.

$$\sqrt{\frac{81}{2}}-\frac{\frac{\left(\frac{2}{3}-1\right)^{-2}}{\left(\frac{1}{5}\right)^{-1}}}{\left(1-\frac{1}{4}\right)^{2}}+\frac{\left(\frac{2-\frac{1}{3}}{\frac{3}{2}-1}\right)^{-2}}{\frac{\frac{1}{2}-\frac{2}{3}}{4-\frac{2}{3}}}$$

Omskriv kvadratroden af inddelings \sqrt{\frac{81}{2}} som opdeling af kvadratiske rødder \frac{\sqrt{81}}{\sqrt{2}}.

$$\frac{\sqrt{81}}{\sqrt{2}}-\frac{\frac{\left(\frac{2}{3}-1\right)^{-2}}{\left(\frac{1}{5}\right)^{-1}}}{\left(1-\frac{1}{4}\right)^{2}}+\frac{\left(\frac{2-\frac{1}{3}}{\frac{3}{2}-1}\right)^{-2}}{\frac{\frac{1}{2}-\frac{2}{3}}{4-\frac{2}{3}}}$$

Beregn kvadratroden af 81, og find 9.

$$\frac{9}{\sqrt{2}}-\frac{\frac{\left(\frac{2}{3}-1\right)^{-2}}{\left(\frac{1}{5}\right)^{-1}}}{\left(1-\frac{1}{4}\right)^{2}}+\frac{\left(\frac{2-\frac{1}{3}}{\frac{3}{2}-1}\right)^{-2}}{\frac{\frac{1}{2}-\frac{2}{3}}{4-\frac{2}{3}}}$$

Rationaliser \frac{9}{\sqrt{2}} ved at multiplicere tælleren og nævneren med \sqrt{2}.

$$\frac{9\sqrt{2}}{\left(\sqrt{2}\right)^{2}}-\frac{\frac{\left(\frac{2}{3}-1\right)^{-2}}{\left(\frac{1}{5}\right)^{-1}}}{\left(1-\frac{1}{4}\right)^{2}}+\frac{\left(\frac{2-\frac{1}{3}}{\frac{3}{2}-1}\right)^{-2}}{\frac{\frac{1}{2}-\frac{2}{3}}{4-\frac{2}{3}}}$$

Kvadratet på \sqrt{2} er 2.

$$\frac{9\sqrt{2}}{2}-\frac{\frac{\left(\frac{2}{3}-1\right)^{-2}}{\left(\frac{1}{5}\right)^{-1}}}{\left(1-\frac{1}{4}\right)^{2}}+\frac{\left(\frac{2-\frac{1}{3}}{\frac{3}{2}-1}\right)^{-2}}{\frac{\frac{1}{2}-\frac{2}{3}}{4-\frac{2}{3}}}$$

Subtraher 1 fra \frac{2}{3} for at få -\frac{1}{3}.

$$\frac{9\sqrt{2}}{2}-\frac{\frac{\left(-\frac{1}{3}\right)^{-2}}{\left(\frac{1}{5}\right)^{-1}}}{\left(1-\frac{1}{4}\right)^{2}}+\frac{\left(\frac{2-\frac{1}{3}}{\frac{3}{2}-1}\right)^{-2}}{\frac{\frac{1}{2}-\frac{2}{3}}{4-\frac{2}{3}}}$$

Beregn -\frac{1}{3} til potensen af -2, og få 9.

$$\frac{9\sqrt{2}}{2}-\frac{\frac{9}{\left(\frac{1}{5}\right)^{-1}}}{\left(1-\frac{1}{4}\right)^{2}}+\frac{\left(\frac{2-\frac{1}{3}}{\frac{3}{2}-1}\right)^{-2}}{\frac{\frac{1}{2}-\frac{2}{3}}{4-\frac{2}{3}}}$$

Beregn \frac{1}{5} til potensen af -1, og få 5.

$$\frac{9\sqrt{2}}{2}-\frac{\frac{9}{5}}{\left(1-\frac{1}{4}\right)^{2}}+\frac{\left(\frac{2-\frac{1}{3}}{\frac{3}{2}-1}\right)^{-2}}{\frac{\frac{1}{2}-\frac{2}{3}}{4-\frac{2}{3}}}$$

Subtraher \frac{1}{4} fra 1 for at få \frac{3}{4}.

$$\frac{9\sqrt{2}}{2}-\frac{\frac{9}{5}}{\left(\frac{3}{4}\right)^{2}}+\frac{\left(\frac{2-\frac{1}{3}}{\frac{3}{2}-1}\right)^{-2}}{\frac{\frac{1}{2}-\frac{2}{3}}{4-\frac{2}{3}}}$$

Beregn \frac{3}{4} til potensen af 2, og få \frac{9}{16}.

$$\frac{9\sqrt{2}}{2}-\frac{\frac{9}{5}}{\frac{9}{16}}+\frac{\left(\frac{2-\frac{1}{3}}{\frac{3}{2}-1}\right)^{-2}}{\frac{\frac{1}{2}-\frac{2}{3}}{4-\frac{2}{3}}}$$

Divider \frac{9}{5} med \frac{9}{16} ved at multiplicere \frac{9}{5} med den reciprokke værdi af \frac{9}{16}.

$$\frac{9\sqrt{2}}{2}-\frac{9}{5}\times \frac{16}{9}+\frac{\left(\frac{2-\frac{1}{3}}{\frac{3}{2}-1}\right)^{-2}}{\frac{\frac{1}{2}-\frac{2}{3}}{4-\frac{2}{3}}}$$

Multiplicer \frac{9}{5} og \frac{16}{9} for at få \frac{16}{5}.

$$\frac{9\sqrt{2}}{2}-\frac{16}{5}+\frac{\left(\frac{2-\frac{1}{3}}{\frac{3}{2}-1}\right)^{-2}}{\frac{\frac{1}{2}-\frac{2}{3}}{4-\frac{2}{3}}}$$

Subtraher \frac{1}{3} fra 2 for at få \frac{5}{3}.

$$\frac{9\sqrt{2}}{2}-\frac{16}{5}+\frac{\left(\frac{\frac{5}{3}}{\frac{3}{2}-1}\right)^{-2}}{\frac{\frac{1}{2}-\frac{2}{3}}{4-\frac{2}{3}}}$$

Subtraher 1 fra \frac{3}{2} for at få \frac{1}{2}.

$$\frac{9\sqrt{2}}{2}-\frac{16}{5}+\frac{\left(\frac{\frac{5}{3}}{\frac{1}{2}}\right)^{-2}}{\frac{\frac{1}{2}-\frac{2}{3}}{4-\frac{2}{3}}}$$

Divider \frac{5}{3} med \frac{1}{2} ved at multiplicere \frac{5}{3} med den reciprokke værdi af \frac{1}{2}.

$$\frac{9\sqrt{2}}{2}-\frac{16}{5}+\frac{\left(\frac{5}{3}\times 2\right)^{-2}}{\frac{\frac{1}{2}-\frac{2}{3}}{4-\frac{2}{3}}}$$

Multiplicer \frac{5}{3} og 2 for at få \frac{10}{3}.

$$\frac{9\sqrt{2}}{2}-\frac{16}{5}+\frac{\left(\frac{10}{3}\right)^{-2}}{\frac{\frac{1}{2}-\frac{2}{3}}{4-\frac{2}{3}}}$$

Beregn \frac{10}{3} til potensen af -2, og få \frac{9}{100}.

$$\frac{9\sqrt{2}}{2}-\frac{16}{5}+\frac{\frac{9}{100}}{\frac{\frac{1}{2}-\frac{2}{3}}{4-\frac{2}{3}}}$$

Subtraher \frac{2}{3} fra \frac{1}{2} for at få -\frac{1}{6}.

$$\frac{9\sqrt{2}}{2}-\frac{16}{5}+\frac{\frac{9}{100}}{\frac{-\frac{1}{6}}{4-\frac{2}{3}}}$$

Subtraher \frac{2}{3} fra 4 for at få \frac{10}{3}.

$$\frac{9\sqrt{2}}{2}-\frac{16}{5}+\frac{\frac{9}{100}}{\frac{-\frac{1}{6}}{\frac{10}{3}}}$$

Divider -\frac{1}{6} med \frac{10}{3} ved at multiplicere -\frac{1}{6} med den reciprokke værdi af \frac{10}{3}.

$$\frac{9\sqrt{2}}{2}-\frac{16}{5}+\frac{\frac{9}{100}}{-\frac{1}{6}\times \frac{3}{10}}$$

Multiplicer -\frac{1}{6} og \frac{3}{10} for at få -\frac{1}{20}.

$$\frac{9\sqrt{2}}{2}-\frac{16}{5}+\frac{\frac{9}{100}}{-\frac{1}{20}}$$

Divider \frac{9}{100} med -\frac{1}{20} ved at multiplicere \frac{9}{100} med den reciprokke værdi af -\frac{1}{20}.

$$\frac{9\sqrt{2}}{2}-\frac{16}{5}+\frac{9}{100}\left(-20\right)$$

Multiplicer \frac{9}{100} og -20 for at få -\frac{9}{5}.

$$\frac{9\sqrt{2}}{2}-\frac{16}{5}-\frac{9}{5}$$

Subtraher \frac{9}{5} fra -\frac{16}{5} for at få -5.

$$\frac{9\sqrt{2}}{2}-5$$

For tilføje eller fratrække udtryk skal du udvide dem for at gøre nævneren ens. Multiplicer 5 gange \frac{2}{2}.

$$\frac{9\sqrt{2}}{2}-\frac{5\times 2}{2}$$

Eftersom \frac{9\sqrt{2}}{2} og \frac{5\times 2}{2} har den samme fællesnævner, kan du trække dem fra dem ved at trække deres tællere fra.

$$\frac{9\sqrt{2}-5\times 2}{2}$$

Lav multiplikationerne i 9\sqrt{2}-5\times 2.

$$\frac{9\sqrt{2}-10}{2}$$

Faktoriser

$$\frac{9 \sqrt{2} - 10}{2} = 1,3639610306789285$$