Datrys (1/3)^-2+(2/3)^-2+(1/4)^-2

$$( \frac { 1 } { 3 } ) ^ { - 2 } + ( \frac { 2 } { 3 } ) ^ { - 2 } + ( \frac { 1 } { 4 } ) ^ { - 2 }$$

Enrhifo

$$\frac{109}{4}=27.25$$

Camau Ateb

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

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

Cyfrifo \frac{2}{3} i bŵer -2 a chael \frac{9}{4}.

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

Adio 9 a \frac{9}{4} i gael \frac{45}{4}.

$$\frac{45}{4}+\left(\frac{1}{4}\right)^{-2}$$

Cyfrifo \frac{1}{4} i bŵer -2 a chael 16.

$$\frac{45}{4}+16$$

Adio \frac{45}{4} a 16 i gael \frac{109}{4}.

$$\frac{109}{4}$$

Ffactor

$$\frac{109}{2 ^ {2}} = 27\frac{1}{4} = 27.25$$