Question

iii) number
please answer fast!! ​

Answer 1

Step-by-step explanation:

(a^-1 +b^-1) ÷(a^-2 -b^-2)

(1/a + 1/b) ÷ (1/a^2 -1/b^2)

(a+b)/ab ÷ (a^2 -b^2)/(ab)^2

(a+b)/ab × (ab*ab)/a^2 - b^2

ab(a+b)/a^2- b^2

ab(a+b)/(a+b)(a-b)

ab/(a-b) answer