By Li J., Su Y., Zhu L.

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**Extra resources for 2-Cocycles of original deformative Schrodinger-Virasoro algebras**

**Sample text**

Answer Begin. 3 1 − 4 3 3 ⋅ 3 1⋅ 4 − 4⋅3 3⋅ 4 In order to add or subtract fractions, the denominators must be the same. These two fractions do not have the same denominator. We must change one or both of the fractions so that they have the same denominator before we can add them. Do this by multiplying the top and bottom of one or both of the fractions by any number you want in order to make the denominators equal. Then you can just subtract them as before. Remember you can always multiply the top and bottom of a fraction by the same number, as long as you do it to BOTH the top and bottom.

We must change one or both of the fractions so that they have the same denominator before we can add them. Do this by multiplying the top and bottom of one or both of the fractions by any number you want in order to make the denominators equal. Then you can just subtract them as before. Remember you can always multiply the top and bottom of a fraction by the same number, as long as you do it to BOTH the top and bottom. In this case multiply the top and bottom of 2 by ‘6’. Also multiply the top and bottom of 9 3 by ‘9’.

Do this by multiplying the top and bottom of one or both of the fractions by any number you want in order to make the denominators equal. Then you can just subtract them as before. Remember you can always multiply the top and bottom of a fraction by the same number, as long as you do it to BOTH the top and bottom. In this case multiply the top and bottom of 1 by ‘2’. 2 3 2 1 + − 4 4 4 Carry out the multiplication. Now all of the fractions have a denominator of ‘4’. com 3 + 2 −1 4 Math Video Tutor Fractions Thru Algebra Section 2 – Fractions Now, just add and subtract the fractions as you have been doing.

### 2-Cocycles of original deformative Schrodinger-Virasoro algebras by Li J., Su Y., Zhu L.

by Anthony

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