Find the radius of the circle .
Answer and explanation
Correct answer: D.
- Step 1: The circle has radius . Step 2. Here , , : . **Answer: . Why not the others:** is what you get if you give the squared radius. is what you get if you add instead of subtracting it. is what you get if you add the centre coordinates.
Practise more Calculus, series and word problems.
Free questions with an explanation for every one, and full timed DTM University Entrance Test (Uzbekistan) mock tests.
More Calculus, series and word problems questions
- A box contains 7 red and 6 blue balls. Two balls are taken at random without replacement. Find the probability that they are of different co…
- A straight line passes through and . Find the value of when .
- Evaluate .
- If and are the roots of , find .
- Find the coordinates of the centre of the circle .
- Evaluate .