the gradient function of a curve is px^2-qx,where p and q are constant .the curve has a turning point at (2,-5).the gradient of the tangent to the curve at the point x=2 is 16.find the value of p and q.

Question

callisto · Answer

1. Find the derivative of px^2-qx
2. Set the derivative =0 to isolate x. Then, set it = 2  <- equation 1
3. Put the derivative = 16 <- equation 2
4. Solve the two equations.

anonymous · Answer

i still cant understand this owh..

callisto · Answer

Which part?

anonymous · Answer

the gradient function of a curve is px^2-qx,where p and q are constant .the curve has a turning point at (2,-1).the gradient of the tangent to the curve at the point x=-1 is 9.find the value of p and q.

anonymous · Answer

this is my quetion.

callisto · Answer

Please start a new post for your question.