Question

1z⁻¹/7z³
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Answer 1

Respuesta:

$\frac{1\cdot \:z^{-1}}{7z^3}\\\\\\\frac{z^{-1}}{7z^3}\\\\\\\frac{1}{7z^{3-\left(-1\right)}}\\\\\\\frac{1}{7z^4}$

Solo use...

$\frac{x^a}{x^b}=\frac{1}{x^{b-a}}\\\\\\ENTENDISTES\:\:\:\:\:\:\:\:\: \frac{z^{-1}}{z^3}=\frac{1}{z^{3-\left(-1\right)}}$