Given a + B + C = 0, ABC = 8, 1 / A + 1 / B + 1 / C

Given a + B + C = 0, ABC = 8, 1 / A + 1 / B + 1 / C

∵a+b+c=0,abc=8
∴a+b=-c,ab=8/c
∴1/a+1/b=(a+b)/ab=-c²/8