Question

efetue e simplifique 1\a+b + 1\a-b

Answer 1

(1/a+b) + (1/a-b) mmc=(a+b)(a-b)
1(a-b)+1(a+b)
a-b+a+b=0

Answer 2

$\frac{1}{a+b} + \frac{1}{a-b} =$
 mmc = (a+b).(a-b) = a²-b²

$\frac{a-b+a+b}{a^2-b^2} = \frac{2a}{a^2-b^2}$