How would you differentiate 3x^4 - 2x^2 + 9x - 1

First we follow the "times by the power and take one from the power" rule. This is the easiest way to remember how to differentiate anything. 

So (3x4)x(4-1) -(2x2)x(2-1)+(9x1)x(1-1) -(1x0)x(0-1) gives us 12x3-4x1+9- 0 

I hope that this is clear. Do you have any questions or something that is unclear?

CE

Related Maths A Level answers

All answers ▸

The quadratic equation 2x^2 + 6x + 7 = 0 has roots A and B. Write down the value of A + B and the value of AB


Differentiate the following equation: y = 2(x^3) - 6x


The weight in grams, of beans in a tin is normally distributed with mean U and S.D. 7.8, given that 10% conntain more than 225g a) Find U b) % of tins that contain more than 225 grams(A2 stats)


i) Using implicit differentiation find dy/dx for x^2 + y^2 = 4 ii) At what points is the tangent to the curve parallel to the y axis iii) Given the line y=x+c only intersects the circle once find c given that c is positive.