Question

Solve this question

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Answer 1

Answer:

ans is 10

Step-by-step explanation:

{ (8^-1)-(9^-1) }^-1÷ {(4^-1)- (9^-1)} ^-1

1/(8^-1) - ( 9^-1) ÷ 1/(4^-1) - (9^-1)

1/(1/8-1/9) ÷ 1/ (1/4-1/9)

1/(9-7/72) ÷ 1/(9-4/36)

1/(1/72) ÷ 1/(5/36)

72 ÷ 36/5

72 ÷ 7.2

10

hope this answers will help you