Jawabanmu

2014-07-24T15:06:26+07:00
Jawaban nol kan pangkat -1 kali -1 = 1 

jadi a^1 - b^1 / a^1 + b^1 = 0
2014-07-24T15:13:47+07:00
=a^-1 + b^-1 / a^-1 - b^-1
=1/a + 1/b ÷ 1/a - 1/b
= a+b/ab ÷ a-b/ab
=a+b/a-b