The length of a curve
Task number: 3144
Determine
Variant 1
circumference of a circle with radius \(r\).
Variant 2
the lenght of the curve \(y = x^{3/2}\) for \(x \in [0,a]\).
Variant 3
the lenght of the curve \(y = \frac14 x^2 + \frac12 \ln x\) for \(x \in [1,e]\).
