Posted by BEN on .
Show that the curve given below has no tangent line with slope m1, where:
y = 4 x^3 + 8 x  6
m1 = 7

calculus 
drwls,
The slope of the y(x) curve is
dy/dx = 12 x^2 + 8
The value of this number must be 8 or higher, for obvious reasons.