If ab > - 1, bc > - 1 and ca > - 1, then is
- 1
0
D.
0
The equation of the tangent to the curve = 1 at the point (x1, y1) is . Then, the value of k is
2
1
3
3
The slope of the normal to the curve x = t2 + 3t - 8 and y = 2t2 - 2t - 5 at the point (2, - 1) is
-