Differentiate ( 4x+2)_3 with respect to x .hence,find the value of dy/ DX when x=1

Answer 1

I'll assume you meant
y = (4x+2)^3
If so, then by the chain rule,
dy/dx = 3(4x+2)^2 * 4
so, y'(1) = 3*6^2*4 = 288