If G(x)=(x)/(1+2x), find G'(a) and use it to find an equation of the tangent line to the curve y=(x)/(1+2x) at the point (-1/4,-1/2).

My answer:

G'(a)=1/(1+2x)^2

Equation of tangent line:

y= 4x+0.5

correct all the way!