Question

please solve this question fast ​

Answer 1

Step-by-step explanation:

a)    ((5^-1)-(7^-1))^-1

=5-7

=-2

B)  2/3-1/2

=(4-3)/6

=1/6

Answer 2

Answer:

Here's your answer in the following attachment!

I was not able to understand e one.

Step-by-step explanation:

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