Datrys 1/x-1-1/x+1

$$\frac { 1 } { x - 1 } - \frac { 1 } { x + 1 }$$

Enrhifo

$$\frac{2}{x^{2}-1}$$

Camau Ateb Byr

I ychwanegu neu dynnu mynegiannau, rhaid i chi eu ehangu i wneud eu enwaduron yr un fath. Lluosrif lleiaf cyffredin x-1 a x+1 yw \left(x-1\right)\left(x+1\right). Lluoswch \frac{1}{x-1} â \frac{x+1}{x+1}. Lluoswch \frac{1}{x+1} â \frac{x-1}{x-1}.

$$\frac{x+1}{\left(x-1\right)\left(x+1\right)}-\frac{x-1}{\left(x-1\right)\left(x+1\right)}$$

Gan fod gan \frac{x+1}{\left(x-1\right)\left(x+1\right)} a \frac{x-1}{\left(x-1\right)\left(x+1\right)} yr un dynodydd, tynnwch nhw drwy dynnu eu rhifiaduron.

$$\frac{x+1-\left(x-1\right)}{\left(x-1\right)\left(x+1\right)}$$

Gwnewch y gwaith lluosi yn x+1-\left(x-1\right).

$$\frac{x+1-x+1}{\left(x-1\right)\left(x+1\right)}$$

Cyfuno termau tebyg yn x+1-x+1.

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

Ehangu \left(x-1\right)\left(x+1\right).

$$\frac{2}{x^{2}-1}$$

Gwahaniaethu w.r.t. x

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