Question

i want the method, pls tell.
Pls don't spam ​

Answer 1

Answer:

(6^-1 – 9^-1)^-1

(1/6¹ – 1/9¹) ^-1

(1/6 – 1/9) ^-1

(1×3 – 1×2 /18) ^-1

(3–2/18)^-1

1/18^-1

1/1/18¹

18/1

18

option (c) is correct.

I hope it helps you