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Alja [10]
3 years ago
13

Multiply or divide as indicated b^3 x b^-3

Mathematics
1 answer:
Andru [333]3 years ago
7 0

The domain: b\neq0

Method 1.

Use\ a^n\cdot a^m=a^{n+m}\\\\b^3\cdot b^{-3}=b^{3+(-3)}=b^{3-3}=b^0=1

Method 2.

Use\ a^{-n}=\dfrac{1}{a^n}\\\\b^3\cdot b^{-3}=b^3\cdot\dfrac{1}{b^3}=\dfrac{b^3}{b^3}=1

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