If , find when and .
Answer and explanation
Correct answer: D.
- Step 1: Add and divide by : . Step 2. Take the positive square root: . **Answer: . Why not the others:** is what you get if you take the negative root. is what you get if you forget the square root. is what you get if you forget the square root after dividing.
Practise more Algebra, Analysis, Geometry and Stochastics.
Free questions with an explanation for every one, and full timed Maturität / Maturité (Switzerland) mock tests.