ciag-leftanright-jest-okreslony-wzorem-ansqrt2n4-dla-nge1-wowczas

$a_8=2\sqrt{5}$a_8=2\sqrt{5}

$a_8=8$a_8=8

$a_8=5\sqrt{2}$a_8=5\sqrt{2}

$a_8=\sqrt{12}$a_8=\sqrt{12}