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  1. If   a + b + c = 0, then the value of
    1
    		 +
    1
    		 +
    1
    		   is
    (a + b)(b + c)(a + c)(b + a)(c + a)(c + b)
    1. 1
    2. 0
    3. –1
    4. –2
Correct Option: B

1
 +
1
 +
1
(a + b)(b + c)(a + c)(b + a)(c + a)(c + b)

=
c + a + b + c + a + b
(a + b)(b + c)(c + a)

=
2(a + b + c )
(a + b)(b + c)(c + a)

= 0 [because;  a + b + c = 0]


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