Question

If the points(x, 4) lies on a circle whose centre is at the origin and radius is 5, then x =

विकल्प

•  ±5

•  ±3

• 0

•  ±4

Answer 1

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`