st-line

Question: The lines ${{a}_{1}}x+{{b}_{1}}y+{{c}_{1}}=0$ and ${{a}_{2}}x+{{b}_{2}}y+{{c}_{2}}=0$ are perpendicular to each other, if

1) ${{a}_{1}}{{b}_{2}}-{{b}_{1}}{{a}_{2}}=0$

2) ${{a}_{1}}{{a}_{2}}+{{b}_{1}}{{b}_{2}}=0$

3) $a_{1}^{2}{{b}_{2}}+b_{1}^{2}{{a}_{2}}=0$

4) ${{a}_{1}}{{b}_{1}}+{{a}_{2}}{{b}_{2}}=0$

Solution:

Explanation: No Explanation

Rate this question:

★ ★ ★ ★ ★

Average rating: (0 votes)