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Question
If the points(x, 4) lies on a circle whose centre is at the origin and radius is 5, then x =
Options
±5
±3
0
±4
Solution
It is given that the point A(x, 4) is at a distance of 5 units from origin O.
So, apply the distance formula to get,
`5^2 = (x)^2 + 4^2`
Therefore,
`x^2 = 9`
So,
`x = +- 3`
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