The curve has two stationary points. Find the difference between their -coordinates (larger minus smaller).
Answer and explanation
Correct answer: C.
- Step 1: Setting gives and . Step 2. and ; the difference is . **Answer: . Why not the others:** is what you get if you add the -values. is what you get if you give the difference of the -values. is what you get if you mix and differences.
Practise more Matrices, Determinants and Coordinate Geometry.
Free questions with an explanation for every one, and full timed ECAT Pakistan mock tests.
More Matrices, Determinants and Coordinate Geometry questions
- Find the determinant of the 3×3 matrix with rows (0, -3, 5); (-3, -1, 0); (-3, -3, -1).
- Find the coordinates of the focus of the parabola y² = 16x.
- Find the eccentricity of the ellipse x²/169 + y²/25 = 1.
- Find the eccentricity of the hyperbola x²/16 − y²/9 = 1.
- Find a × b for a = 3i + 0j + 4k and b = 3i + 4j − 2k.
- Solve dy/dx = 5x with y(0) = 2. What is y(4)?