Question

solution is here just tell me how solution come plz it's urgent
it's reasoning
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Answer 1

Answer:

$(a {}^{ - 1} - 1) \div( a - 1) \\ \\ a {}^{ - 1} = 1 \div a \\( 1 \div a - a) \div (a - 1)$

Answer 2

Answer:

So Dikshu,

U want to know how -1/a came?

{ 1 - a/ a } ÷ a -1

= 1 - a/ a × 1 / a - 1

Now taking minus common from 1 - a

it becomes a - 1

= -(a - 1/ a) × a - 1

= -1 / a