$\overline{x}_0$

$f(x,y)=$

Toisen kertaluvun approksimaatio

$\partial_1f$

$\partial_2 f$

$\partial_{12} f=\partial_{21} f$

$\partial_{22} f$

Ensimmäisen kertaluvun approksimaatio

$\partial_{11} f$

f(x, y) = (x^(2) * y)
a = Derivative(f, x)
b = Derivative(f, y)
A = PointIn(f)
InputBox2 = Textfield(f)
c(x, y) = f(A) + (a(A) * (x - x(A))) + (b(A) * (y - y(A)))
d = Derivative(a, x)
e = Derivative(a, y)
g = Derivative(b, y)
i(x, y) = f(A) + (a(A) * (x - x(A))) + (b(A) * (y - y(A))) + (d(A) / 2 * (x - x(A))^(2)) + ((e(A) / 2 * (x - x(A))) * (y - y(A))) + (g(A) * (y - y(A))^(2))
j = false
k = false
l = false
n = false
o = false
h = false
m = false