- #1

thomas49th

- 655

- 0

## Homework Statement

Consider

y = 2a + ax

find dy/dx

dy/dx = a

That is right is it not, as a is treated merly as a constantNow consider this question:

Use the substitution y = vx to transform the equation:

dy/dx = (4x+y)(x+y)/x²

into

x(dv/dx) = (2+v)²

According to the mark scheme they

differentiate dy/dx implicitally

y = vx

dy/dx = x(dv/dx) + v

BUT why have we differentitated implicitally?

Thanks :)