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β« π ππ 2π₯ π βπ ππ₯. ΠΡΡΠΈΡΠ»ΠΈΡΠ΅ ΠΈΠ½ΡΠ΅Π³ΡΠ°Π» Ο β« Ο 2 s i n x c o s 2 x + 1 d x. οΏ½οΏ½ππ2 ( π 4 β π₯) = π ππ2 ( π 4 + π₯). β«(3π₯ + 1) β π ππ2π₯ποΏ½.
