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Let there be n circles no three of which have collinear centres. If the total number of radical axes is equal to total number of possible radical centres, then possible value of n is |
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Answer» ` ^n C_2 = ^n C_3 ` `(n(n-1))/2=(n(n-1)(n-2))/(3xx2)` `n=5` answer`(3)` |
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