Q4 on 2017 Edexcel C4 paper, concerns differentiation of multiple variables.

(a) Asks to differentiate an equation C: 4x2 - y3 - 4xy + 2y = 0Then use the fact that point P (-2,4), lies on C to find an expression for dy/dx Differential of form 8x - 3y2(dy/dx) - (4y + 4x(dy/dx)) + 2yln2(dy/dx) = 0Rearrange and substitute to find dy/dx(b) Asks to find the point where the Normal to C at P intersects the y axis. (form of p + qln2)-1/(dy/dx) to find gradient of normal to C at P, then use x = 0 at Y axis intercept to find y coordinate.

AW
Answered by Alexander W. Maths tutor

3091 Views

See similar Maths A Level tutors

Related Maths A Level answers

All answers ▸

The curve, C has equation y = 2x^2 +5x +k. The minimum value of C is -3/4. Find the value of k.


Differentiate y = (sin(x))^2 (find dy/dx)


Curve C has equation y=(9+11x)/(3-x-2x^2). Find the area of the curve between the interval (0, 1/2). State your answer in exact terms.


Integrate lnx


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences