zbiorem-rozwiazan-nierownosci-displaystyle-frac12-5x2andlt3left1-frac12x-right7x-jest

A)

$\displaystyle \left(-\infty, \frac{2}{7} \right)$ \displaystyle \left(-\infty, \frac{2}{7} \right)

B)

$\displaystyle \left( \frac{2}{7},+\infty \right)$ \displaystyle \left( \frac{2}{7},+\infty \right)

C)

$\displaystyle \left(-\infty, \frac{3}{8} \right)$ \displaystyle \left(-\infty, \frac{3}{8} \right)

D)

$\displaystyle \left( \frac{3}{8},+\infty \right)$ \displaystyle \left( \frac{3}{8},+\infty \right)