Bài học: Vẽ đồ thị

f(x)=a*x^3+b*x^2+c*x+d

g(x)=f'(x)

a = -0.2999999999999998 (slider from -5 to 5, step 0.1)
b = -0.8999999999999995 (slider from -5 to 5, step 0.1)
c = 1.7000000000000002 (slider from -5 to 5, step 0.1)
d = 2.5 (slider from -5 to 5, step 0.1)
f(x) = a x³ + b x² + c x + d
g(x) = f'(x)