Question

plz fast anser my question



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Answer 1

$i) \: \frac{1}{ {7}^{ - 4} } \\ \\ ii) \: \frac{1}{ {x}^{n} } \\ \\ iii) \frac{1}{ {10}^{3} }$

Hope it helps...

Answer 2

refer this picture and feel free to ask