Question

a) By what number should
1/-4^-1
be multiple so that the product may be equal to 4/7^-1​

Answer 1

What you need to know to solve this question is the basic properties of indices .

One property of indices states  :

$x^{-1} = \frac{1}{x}$

$\frac{1}{-4^{-1} } = -4\\\\ \frac{4}{7^{-1}} = 28$

Now we can clearly see that the answer is -7 .

Hope This Helps (●'◡'●)