Q. If $a + b + c = 1, a^{2} + b^{2} + c^{2} = 9$ and $a^{3} + b^{3} + c^{3} = 1$ , then the value of $\frac{1}{a} + \frac{1}{b} + \frac{1}{c}$ is :

420 95 Sequences and Series Report Error

A

$\frac{2}{3}$

B

5

C

6

D

1

Solution:

Correct answer is (d) 1