Question

Consider the laws of exponents AA=Ar+1A^{\prime} A^{\prime}=A^{r+1} and (Ar)=Ars\left(A^r\right)^{\prime \prime}=A^{r s}. Show that if AA is invertible, then these laws hold for all negative integer values of rr and ss.

Solution

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Answered 2 years ago
Answered 2 years ago
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If r and s are negative integers,

then let p=r\mathrm{p}=-\mathrm{r} and q=s\mathrm{q}=-\mathrm{s} ( p and q are positive)

By definition, if A is invertible, $A^{-n}=(A^{-1})^{n}.

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