tlg bantu jawab,. yg no.1 dan memakai cara.. trimakasih :)

x1 + x2 = -b/a
x1 + x2 = -4/3

x1 . x2 = c/a
x1 . x2 = -1/3

1/x1 + 1/x2 = (x2 + x1) / (x1 . x2)
= -4/3 . -3
= 4

3x^2 + 4x - 1 = 0
1/x1 + 1/x2 = -b/c = -4/-1 = 4