st-line

Question: If the lines $ax+by+c=0$, $bx+cy+a=0$ and $cx+ay+b=0$ be concurrent, then

1) ${{a}^{3}}+{{b}^{3}}+{{c}^{3}}+3abc=0$

2) ${{a}^{3}}+{{b}^{3}}+{{c}^{3}}-abc=0$

3) ${{a}^{3}}+{{b}^{3}}+{{c}^{3}}-3abc=0$

4) None of these

Solution:

Explanation: No Explanation

Concurrency of three lines

Rate this question:

★ ★ ★ ★ ★

Average rating: (0 votes)