x=1

f(x) = \frac{1}{\sqrt{x}}

x=9

A = Point(xAxis)
B = Intersect(a, xAxis)
c = Ray(B, A)
C = Point(c)
b: x = x(C)
f(x) = 1 / sqrt(x)
A_2 = Integral(f, x(B), x(C))
T2: "d = " + (x(C))
A_1 = Integral(f, 1, 9)