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Let the equation x^(2)+y^(2)+px+(1-p)y=0...

Let the equation `x^(2)+y^(2)+px+(1-p)y=0` represent circles of varying radius `r in (0,5]`. Then the number of elements in the set `S={q : q =p^(2)` and q is an integer } is __________.

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JEE MAINS PREVIOUS YEAR-JEE MAINS 2021-Mathematics (Section B)
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