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If the lines ax + by + c=0,bx+cy+a=0 and cx+ay+b=0 be concurrent then A.a^3+b^3+c^3-3abc=0 B. a^3+b^3+c^3-abc C.a^3+b^3+c^3+3abc. D.none of these Sir pls explain the answer in detail. Thanks and regards, Jai

If the lines ax + by + c=0,bx+cy+a=0 and cx+ay+b=0 be concurrent then
A.a^3+b^3+c^3-3abc=0 B. a^3+b^3+c^3-abc
C.a^3+b^3+c^3+3abc.    D.none of these
Sir pls explain the answer in detail. 
Thanks and regards,
Jai

Grade:12

1 Answers

Ravi
askIITians Faculty 69 Points
6 years ago
Solve the equations .
It is in 2 variables. So use any 2 equations to get the value of x and y.

Put in the 3rdeqn to get the result which is option A
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