2. Index rule proofs HomeMaths3. A levelEdexcelPure 1C103. Indices (or powers)2. Index rule proofs 2.1. Index rule proof – multiplying numbers with powers 2.2. Index rule proof – dividing numbers with powers 2.3. Index rule proof – powers of powers 2.4. Index rule proof – zero and negative powers 2.1. Index rule proof – multiplying numbers with powers 2.2. Index rule proof – dividing numbers with powers 2.3. Index rule proof – powers of powers 2.4. Index rule proof – zero and negative powers