Engineering entrance
Exam
Numerical Ability
If the circles x^2+y^2+2x+2ky+6=0 and x^2+y^2+2ky+k=0 intersect orthogonally, then the value of k is-: a)2 or -3/2 b)-2 or -3/2 c)2 or 3/2 d)-2 or 3/2?
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