@ @QQ@ @óïbÿa@‡ÉÜa@ú†bjà@ @
.y x
. 4 × 4 = 16
16 + 16 + 16 = 48
()
90
.x =/ 0 :
.y x xyz :
. 4 × 5 × 5 = 100
x ≠ 0 xyz :
yx 0,2,4,6,8 y
. 5 × 5 × 5 = 125 .1, 3 , 5 , 7 , 9
. z x =/ 0 xyz :
. 5 × 5 × 5 = 125
.100 + 125 + 125 = 350
43 ()
{1, 2, 3, 4, 5, A,B,C, D, E}