Question

Ab pangkat -1 — a pangkat -1 b
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a pangkat -1 — b pangkat -1


Tolong dijawab penting

Answer 1

(a b^-1  -  a^-1 b)/(a^-1  -  b^-1)
kali keua ruas dg ab/ab, get
= (a^2 - b^2)/(b - a)
= (a+b)(a-b)/(b-a)
= -(a+b)
= - a - b

Answer 2

ab^-1 - a^-1b  = a/b - b/a  =  (a²-b²)/ab = (a - b)(a + b) = - (a + b) = - a - b
  a^-1 - b^-1      1/a - 1/b      (b - a)/ab        -(a - B)