1/3 3/9 2/3 13/21 ( ) A.17/27 B.17/26 c.19/27 D.19/28
数字推理 1/3 3/9 2/3 13/21 ( ) a.17/27 b.17/26 c.19/27 d.19/28 请
1/3 3/9 2/3 13/21 ( ) A.17/27 B.17/26 c.19/27 D.19/28
3/9 2/3 13/21 ( ) A.17/27 B.17/26 C.19/27 D.19/28
1/3 3/9 2/3 13/21 ( )A.17/27 B.17/26 C.19/27 D.19/28答案是B为什么?
1/3,/3/9,2/3,13/21,( )A.17/27 B.17/26 C.19/27 D.19/28答案是A
1/3 3/9 2/3 13/21 ( )A.17/27 B.17/26 C.19/27 D.19/28 求下一个.
2,3,6,9,17,( )A.33 B.27 C.45 D.19
a、b、c、d表示4个有理数,其中每三个数之和是-1,-3,2,17,求a、b、c、d.
数学解方程,复杂啊-12=3a+2b+c ①0=-a+b-c+d②0=27a+9b+3c+d③1=a+b+c+d④帮忙解
例题:157 65 27 11 5 () A.4 B.3 C.2 D.1
若a-b=2,b-c=-3,c-d=5,则(a-c)(b-d)÷(a-d)= ___ .
A B C D E F G 1 3 5 7 9 11 23 21 19 17 15 13 25 27 29 31 33