Question

value of (7^-1-8^-1)^-1 - (3^-1-4^-1) is​

Answer 1

Step-by-step explanation:

$( {7}^{ - 1} - {8}^{ - 1} ) ^{ - 1} - ( {3}^{ - 1} - {4}^{ - 1} ) \\ (- 7 + 8) ^{ - 1} - ( - 3 + 4) \\( 1) ^{ - 1} - 1 \\ - 1 - 1 \\ - 2$