pair-st-lines

Question: If the ratio of gradients of the lines represented by $a{{x}^{2}}+2hxy+b{{y}^{2}}=0$is 1 : 3, then the value of the ratio ${{h}^{2}}:ab$is



1) $\frac{1}{3}$
2) $\frac{3}{4}$
3) $\frac{4}{3}$
4) 1
Solution: Explanation: No Explanation
Equation of pair of straight lines

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