Question on: JAMB Mathematics - 2001
If the gradient of the curve y = 2kx2 + x + 1 at x = 1 is 9, find k.
A
4
B
3
C
2
D
1
Ask EduPadi AI for a detailed answer
Correct Option: C
y = 2kx2 + x + 1
Gradient function dy/dx = 4kx + 1
at dy/dx = 9, => 9 = 4kx + 1
=> 8 = 4kx, and k = 8/4x.
At x = 1, k = 8/4 = 2
Gradient function dy/dx = 4kx + 1
at dy/dx = 9, => 9 = 4kx + 1
=> 8 = 4kx, and k = 8/4x.
At x = 1, k = 8/4 = 2
Add your answer
Please share this, thanks!
No responses