1 3 2 4_9 July 8, 2019 16 32 64 128 1 2 3 4 99 1 2 3 4 90 1 2 3 4 9 8 1 2 3 4 9 6 1 2 3 4 9 7 1 2 3 4 99 gauss 1 2 3 4 9 5 X 1 3 2 4 9 1 3 pi 4 2 9 1 2 3 4 5 to 99 formula 1 2 3 4 5 to 99 1 3 x 2 )= 4 9x 2 1 2 3 4 99 bằng bao nhiêu
