Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$$-3^{-}7=$$

Answer

-1/2187

Solution


Use Negative Power Rule: \({x}^{-a}=\frac{1}{{x}^{a}}\).
\[-\frac{1}{{3}^{7}}\]
Simplify  \({3}^{7}\)  to  \(2187\).
\[-\frac{1}{2187}\]

Decimal Form: -0.000457

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