0,9,26,65,124,( ) A.165 B.193 C.217 D.239
0,9,26,65,124,( ) A.165 B.193 C.217 D.239
0,9,26,65,124,(A.186 B.215 C.216 D.21734,36,35,35,(),34,37(A
求证(b,c,d)a+(c,a,d)b+(a,b,d)c+(b,a,c)d=0 a,b,c,d皆为向量>
已知向量a+b+c+d=0,求证|a|+|b|+|c|+|d| >=|a+d|+|b+d|+|c+d|.
a>0,b>0,c>0,d>0,且b/a>d/c,求证b+d/a+c>d/c
a,b,c,d>0 证(a/(b+2c+3d))+(b/(c+2d+3a))+(c/d+2a+3b))+(d/(a+2b
[a,b)×[c,d
a,b ,c ,d
a=b=c=0,printf("%d,%d,%d,%d",a,b,c,a++ &&b++||c++)
0,9,26,65,124,( )A.186 B.217 C.216 D.215本人资质有限,算了好久仍是一头雾水,
A B C D × 9 ___________________ D C B A (1) A = ( )(2) B = (
已知a,b,c,d 属于(符号)R 且b>0,-c/a < -d/b,则() A.bcad C.a/c >d/b D.a