Odpowiedź:
(2/3 + 4 1/7 + 1/3 + 2 6/7) * 2 =
= ( 2/3 + 29/7 + 1/3 + 20/7) * 2 =
= (2/3 + 1/3 + 29/7 + 20/7) * 2 =
= [(2/3 + 1/3) + (29/7 + 20/7)] * 2 =
= (3/3 + 49/7) * 2 =
= ( 1 + 7) * 2 =
= 8 * 2 =
= 16
Odpowiedź:
(2/3 + 4 i 1/7 + 1/3 + 2 i 6/7) * 2 = (14/21 + 4 i 3/21 + 7/21 + 2 i 18/21) * 2 =
6 i 42/21 * 2 = 168/21 * 2 = 8 * 2 = 16