If `a=b c` and `c=a-b` , then the value of `a` is `b^2-1` (b) `(b^2)/(b-1)` (c) `b/(b-1)` (d) None of these

If a=bc and c=a-b, then the value of a is b^(2)-1( b )(b^(2))/(b-1) (c) (b)/(b-1) (d) None of these

If a+b=2c, then the value of (a)/(a-c)+(b)/(b-c) is (1)/(2)(b)1(c)2(d)3

If (a)/(b+c)=(b)/(c+a)=(c)/(a+b)=K, then the value of K is +-(1)/(2)(b)(1)/(2) or -1(c)-1(d)(1)/(2)

if b+c=a^2, c+a=b^2 and a+b=c^2 then find the value of 1/(1+a) + 1/(1+b) +1/(1+c)

If a b+b c+c a=0 , then what is the value of (1/(a^2-b c)+1/(b^2-c a)+1/(c^2-a b)) ? (a) 0 (b) 1 (c) 3 (d) a+b+c

if a, b, c, a_1, b_1 and c_1 are non-zero complexnumbers satisfying a/a_1+b/b_1+c/c_1=1+i and a_1/a+b_1/b+c_1/c=0, where i=sqrt-1, the value of a^2/a_1^2+b^2/b_1^2+c^2/c_1^2 is (a)2i (b)2+2i (c)2 (d)None of these

if a, b, c, a_1, b_1 and c_1 are non-zero complexnumbers satisfying a/a_1+b/b_1+c/c_1=1+i and a_1/a+b_1/b+c_1/c=0, where i=sqrt-1, the value of a^2/a_1^2+b^2/b_1^2+c^2/c_1^2 is (a)2i (b)2+2i (c)2 (d)None of these