y=φ(x)

$ \dfrac{1}{\sqrt{2\pi}} $

←

$ a $

$ b $

a = RandomNormal(0, 1)
f(x) = exp((-x^(2)) / 2) / (sqrt(2 * π) * abs(1))
A = Point(xAxis)
B = Point(xAxis)
C: (x(A), f(x(A)))
D: (x(B), f(x(B)))
b = Segment(C, A)
c = Segment(D, B)
d = Integral(f, x(A), x(B))
texte5: "$\shadowbox{ p(a \leqslant X\leqslant b)=" + (LaTeX[d]) + "}$"