Odpowiedź:
f(x) = 1/3x² , g(x) = 6
1/3x² = 6 | * 3
x² = 18
x²- 18 = 0
(x - √18)(x + √18) = 0
[x - √(9 * 2)][x + √(9 *2)] = 0
(x - 3√2)(x + 3√2) = 0
x - 3√2 = 0 ∨ x + 3√2 = 0
x = 3√2 ∨ x = - 3√2
a = 3√2
b = - 3√2
IABI = a - (- b) = 3√2 - (- 3√2) = 3√2 + 3√2 = 6√2