Datrys {left(1/3right)}^2+{left(1/3right)}^-2+{left(-1/3right)}^3+3^-2

$${ \left( \frac{ 1 }{ 3 } \right) }^{ 2 } + { \left( \frac{ 1 }{ 3 } \right) }^{ -2 } + { \left(- \frac{ 1 }{ 3 } \right) }^{ 3 } + { 3 }^{ -2 }$$

Enrhifo

$$\frac{248}{27}\approx 9.185185185$$

Camau Ateb

Cyfrifo \frac{1}{3} i bŵer 2 a chael \frac{1}{9}.

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

Cyfrifo \frac{1}{3} i bŵer -2 a chael 9.

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

Adio \frac{1}{9} a 9 i gael \frac{82}{9}.

$$\frac{82}{9}+\left(-\frac{1}{3}\right)^{3}+3^{-2}$$

Cyfrifo -\frac{1}{3} i bŵer 3 a chael -\frac{1}{27}.

$$\frac{82}{9}-\frac{1}{27}+3^{-2}$$

Tynnu \frac{1}{27} o \frac{82}{9} i gael \frac{245}{27}.

$$\frac{245}{27}+3^{-2}$$

Cyfrifo 3 i bŵer -2 a chael \frac{1}{9}.

$$\frac{245}{27}+\frac{1}{9}$$

Adio \frac{245}{27} a \frac{1}{9} i gael \frac{248}{27}.

$$\frac{248}{27}$$

Ffactor

$$\frac{2 ^ {3} \cdot 31}{3 ^ {3}} = 9\frac{5}{27} = 9.185185185185185$$