dany-jest-ciag-leftanright-okreslony-wzorem-displaystyle-an-fracnleft-2rightn-dla

$\displaystyle a_3= \frac{1}{2}$\displaystyle a_3= \frac{1}{2}

$\displaystyle a_3= -\frac{1}{2}$\displaystyle a_3= -\frac{1}{2}

$\displaystyle a_3= \frac{3}{8}$\displaystyle a_3= \frac{3}{8}

$\displaystyle a_3= -\frac{3}{8}$\displaystyle a_3= -\frac{3}{8}