Hi
I few question i am having troubling finding the gradient:
1) Given that the curve y=ax^2+\frac{b}{x} has a gradient of -5 at the point (2, -2) find the value of a and b.
this is how i approached it:
when x=2
(1)
when x=2,y=-2
(2)
(1)-(2)
this is where a got stuck because when i added and minus it didn't work.
2)Find the gradient of the curve at the point where the curve crosses the x-axis.
P.S