Find the equation of the normal to the curve 2x^3+3xy+2/y=0 at the point (1,-1)

Step 1 Use Implicit differentiation with respect to x and y - 6x^2+3y + 3x(dy/dx) - 2/y^2(dy/dx) = 0Step 2 Write the equation as dy/dx =... - dy/dx = (6x^2 + 3y)/(2/y^2 - 3x)Step 3 Input (1,-1) into the equation to find gradient of tangent. - Gradient of tangent = -3Step 4 Use knowledge the knowledge that the gradient of the normal is equal to the negative reciprocal of the tangent. - Gradient of Normal = 1/3Step 5 Write the equation of the normal in point slop form- y+1 = 1/3(x-1)Step 6 Rearrange so it is in the form y=mx+c - y=1/3(x)-4/3















Related Maths A Level answers

All answers ▸

What is a radian?


The quadratic equation 2x^2 + 8x + 1 = 0 has roots a and b. Write down the value of a + b, a*b and a^2 + b^2.


Integrate (x+3)^(1/2) .dx


A circle with equation x^2+y^2-2x+8y-40=0. Find the circle centre and the radius


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2024

Terms & Conditions|Privacy Policy
Cookie Preferences