246−2−4−6510152025−5−10
f(x)=ax3+bx2+cx+d+ex1+fx2+gx3
a = 0.0
b = 0.0
c = 0.0
d = 0.0
e = 0.0
f = 0.0
g = 0.0
f(x)=0
tangent
gradient = 0.0000
246−2−4−6510−5−10−15
f(x)=0