circle

Question: The value of $\lambda $ , for which the circle ${{x}^{2}}+{{y}^{2}}+2\lambda x+6y+1=0$ , intersects the circle ${{x}^{2}}+{{y}^{2}}+4x+2y=0$ orthogonally is

1) $\frac{-5}{2}$

2) $-1$

3) $\frac{-11}{8}$

4) $\frac{-5}{4}$

Solution:

Explanation: No Explanation

System of circles

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