1/4,3/9,7/16,13/25,21/36第9个数是多少?第n个数呢?
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(1) 1,1,2,4,3,9,4,16,( ),25,6( )(2)15,16,13,19,11,22,( ),25,7,( )
一.1,2,3,5,( ),13,21,34,( ),( ).二.1,-2,4,-8,16,( ),( ).三.-3/4,5/9,-7/16,9/25,( ).
找规律1/4,3/9,7/16,13/25,21/361/4,3/9,7/16,13/25,21/36 第n个数是多少呢
(25+3/4)×4/1+1/4= 18/25×9/16+7/2(25+3/4)×4/1+1/4= 18/25×9/16+7/25×9/16+9/16= 能简算就简算,
研究这两组数的规律,分别用代数式表示第n个数(1)1,5,9,13,17,21,----(2)1,3/4,5/9,7/16,9/25,----
能简算的需要简算.拖式.1/5÷[(2/3+1/5)*1/13]2/3*7+2/3*5(1/6-1/12)*24-4/5(32*1/4+17)÷5/12(25+3/4)÷1/4+1/418/25*9/16+7/25*9/16+9/16
(1)1,1,2,4,3,9,4,16,( ),25,6,( )(2)15,16,13,19,11,22,( ),25,7,( ),(3)21,3,18,3,15,3,( ),( ),( ),
找规律1/2,4/5,9/13,16/25,( ),( )
1,3/4,9/5,7/16,25/9,()
数字推理 3/7,1/2/,7/13,9/16,()
3/7,1/2,7/13,9/16,(
1/4,3/9,7/16,13/25,21/36第9个数是多少?第n个数呢?
① 2/3,8/9,3/4,2,( ) ② 19/13,1,13/19,10/22,( ) ③ 3/7,1/2,7/13,9/16,( )
这几道数量关系题谁会做?(1)12,4,8,6,7,()(2) 0,1,1,2,4,7,13,()(3) 1/2,1/3,7/3,16/3,()(4)2,3,11,65,()(5)1/4,2/11,1/10,4/67,()(6)1/3,3/5,2/8,-1/13,-3/21,()(7)28,1,14,1/28,(),1/10976(8)2,10,30,(),130,222(9)3/7,3/5,9/16,12/25,()
找规律填空.(1)1,1,2,4,3,9,4,16,(),25,6...(2)15,16,13,19,11,22,(),25,7,()说明道理.各位哥哥姐姐帮帮忙吧.五分钟之内啊!、
-13*2/3-0.34*2/7+1/3*(-13)-9/7*0.34【1又7/8-(3/8+1/16-3/4)*(-4)³】/5
按规律填数 1,4,7,10,( ),16,19 4,9,16,25,( ),49,64 1,3,7,15,31,63,( ),1,2/3,5/8,13/21,34/35
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26等于多少