Так как функция f(x) нечетная, то f(-x) = -f(x).
Тогда f(-2) = -f(2) и f(-\frac{1}{2}) = -f(\frac{1}{2}).
f(2) = -2² - \frac{1}{2} = -4 - \frac{1}{2} = -\frac{9}{2}
f(\frac{1}{2}) = -(\frac{1}{2})² - \frac{1}{\frac{1}{2}} = -\frac{1}{4} - 2 = -\frac{9}{4}
f(-2) = -f(2) = -(-\frac{9}{2}) = \frac{9}{2}
f(-\frac{1}{2}) = -f(\frac{1}{2}) = -(-\frac{9}{4}) = \frac{9}{4}
f(-2) - f(-\frac{1}{2}) = \frac{9}{2} - \frac{9}{4} = \frac{18}{4} - \frac{9}{4} = \frac{9}{4} = 2.25
Ответ: 2.25