Question

Its from exponent chapter. Solve it​

Answer 1

Answer:

17.5

Step-by-step explanation:

5^-1 = 1/5 and 7^-1 = 1/7

so 5^-1 - 7^-1 = 1/5-1/7 = 2/35

now , for the bracket we resiprocal it once more and we get ,

(2/35)^-1 = 35/2 which you can also write as

17.5

good luck