作业帮1/4+(2+1/10)+(4+1/18)+(6+1/28)+(8+1/40)+(10+1/54)=?
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1/4+(2+1/10)+(4+1/18)+(6+1/28)+(8+1/40)+(10+1/54)=?
1/4+(2+1/10)+(4+1/18)+(6+1/28)+(8+1/40)+(10+1/54)=?
1/4+(2+1/10)+(4+1/18)+(6+1/28)+(8+1/40)+(10+1/54)=?
1/4+(2+1/10)+(4+1/18)+(6+1/28)+(8+1/40)+(10+1/54)
=(0+2+4+6+8+10)+(1/4+1/10+1/18+1/28+1/40+1/54)
=30+733/1512
30.48478836
1/4+(2+1/10)+(4+1/18)+(6+1/28)+(8+1/40)+(10+1/54)=?
5+4+3+2+1+8+10+7+18+2
1/2×2+1/4×3+1/6×4+1/8×5+…1/18×10=?
求：数字推理 1,2,4,6,7,18,10,( )
1 3 4 7 10 18 29 ( ) ( )
数字推理78,38,18,10,4,()详解78,38,18,10,4,()四个备选答案2,1,4,3
1/2+1/4+1/6+1/8+1/10+1/12+1/14+1/16+1/18+1/20的计算结果和简便计算方式
[2^4+1/4)(4^4+1/4)(6^4+1/4)(8^4+1/4)(10^4+1/4)】/[1^4+1/4)(3^4+1/4)(5^4+1/4)(7^4+1/4)(9^4+1/4)]
1/2*1/3+1/3*1/4+1/4*1/5.+1/18*1/19+1/19*1/20
2x-△/3-2x+1/4=10x+1/6-1 x=-1/18
2x-△/3-2x+1/4=10x+1/6-1 x=-1/18 求△
1/1*2*3+1/2*3*4+1/3*4*5+.+1/18*19*20
(-18)×4/9×4/9×(-1/10) 递等式
（1+1/2)*(1+1/3)*(1+1/4)*…*(1+1/18)*(1+1/19)*(1+1/20)
/1/3-1/2/+/1/4-1/3/+/1/5-1/4/+.+/1/10-1/9/
|1/3-1/2|+|1/4-1/3|+|1/5-1/4|+...+|1/10-1/9|
1/18+(2/3+4/21)=?
1+2+3+4*10