var('x')
f(x) = 3*x^2-6*x+2
x1 = 4
y1 = f(x1)
df(x) = diff(f(x), x)
print df(x)
6*x - 6 6*x - 6 |
m = df(x1) # 접선의 기울기
print m
18 18 |
p1 = plot(f(x),(x,0,5))
p2 = plot(y1 + m*(x-x1), (x, 0, 5), color='green')
p3 = point([x1,y1],color='green')
p1+p2+p3
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print "y = ", y1 + m*(x-x1)
y = 18*x - 46 y = 18*x - 46 |
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