Question

By what number should we multiply
${( - 8)}^{ - 1}$
to obtain a product equal to
${10}^{ - 1}$
​

Answer 1

$( - 8) ^{ - 1} k = 10^{ - 1} \\ \\ 1 \div {- 8}k \: = 1 \div 10 \: \\ \\ k = - 8 \div 10 \: or \: \\ \\ \\ k \: = - 4 \div 5 \: is \: the \: answer \:$

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