1.

Consider the circle C_(1):x ^(2) +y ^(2) -6x - 8y + 15=0, C_(2) : x ^(2) + y ^(2) - 6x - 8y + 20 =0 Now from any point P on C_(1), pair of tangents PA and PB are drawn onC_(2). Then locus of the orthocenter of triangle PAB is

Answer»

`X ^(2) +y ^(2) - 6x - 8y + 20 =0`
`x ^(2) + y^(2) - 6x - 8y + 10=0`
`x ^(2) +y ^(2) - 6x - 8y + 5=0`
NONE of these

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