Di nuovo:
y = √((2·x^2 - x - 3)/(x^2 - 4))
C.E.
(2·x^2 - x - 3)/(x^2 - 4) ≥ 0
Segno N(x):
2·x^2 - x - 3 ≥ 0-------> x ≤ -1 ∨ x ≥ 3/2
++++++++++[-1]-----------[3/2]++++++++>x
Segno D(x):
x^2 - 4 > 0-------> x < -2 ∨ x > 2
++++(-2)---------------------------------(2)++++>x
Segno rapporto:
++++(-2)-----[-1]++++++[3/2]-------(2)+++++>x
C.E.x < -2 ∨ -1 ≤ x ≤ 3/2 ∨ x > 2