11.21.31.判断1.2.3.4.5.6.2.3.4.5.帮个忙了
1个回答
11 等腰直角
12 48
13 6:7,4:5,14:15
1 错
2 对
3 错
4 错
5 对
6 错
1 C
2 A
3 B
4 B
5 CA
相关问题
11+21+2+31+2+3+41+2+3+4+5前n项和是多少大神们帮帮忙
(-1/2)+(-51/5)+2-(-31/5)+(-4.5)-(21/3)
n 1 2 3 4 5 6 75n+6 11 16 21 26 31 36 41n^2 1 4 9 16 25 36 4
帮我算几道数学题,(1)(—21.6)+3-7.4+(—5分之2) (2)31+(—4分之5)+0.25 (3)7-(—
数学(添运算符号)1 2 3 4 =11 2 3 4 5 =11 2 3 4 5 6 =11 2 3 4 5 6 7 =
0,1,2,3,4,5,67,8,9任意5个相加和值分别等于:11,21,31.
有理数的加减混合运算7+(-2)-3.4—21.6+3-7.4+(-2/5)31+(-5/4)+0.257-(-1/2)
1*2*3+2*4*6+7*14*21+11*22*33/1*3*5+2*6*10+7*21*35+11*33*55
观察:1*2*3*4+1=5*5; 2*3*4*5+1=11*11; 3*4*5*6+1=19*19;
((7-2√5)(5+√7)(31+13√5))/((6-2√7)(3+√5)(11+4√7))