Jika x1 dan x2 merupakan akar akar dari x^2 - 4x - 2 = 0 , nilai 1/ x1 + 1/x2 = ... Mohon di bantu yaa

jawab

persamaan kuadrat
x^2 - 4x - 2 = 0
a = 1
b = - 4
c = - 2
x1 + x2 = -b/a = 4
x1.x2 = c/a = -2

1/x1 + 1/x2 = (x1 + x2)/(x1 . x2) = (4/) (-2) = - 2