Set up an integral that represents the length of the curve and use technology to find the length correct to four decimal places.
a) ∫₀⁶ √(1 + e(-2x)) dx
b) ∫₀⁶ √(1 - e(-2x)) dx
c) ∫₀⁶ √(1 + e(2x)) dx
d) ∫₀⁶ √(1 - e(2x)) dx