22-12=3,32-22=5·······用n表示其规律

22-12=3,32-22=5·······用n表示其规律 变态数学题·······方程一道············x+2y+3z=1x=y+12x+3y+5z=2方程组············要过程············我解了之后总觉得无解····· 数学题（16x-13)/(4x-3)+（40x-43)/(8x-9)=（32x-30)/(8x-7)+（20x-24)/(4x-5)在线等··············求过程··············· 12+22+32+···+n2无 解方程组,格式过程最重要5x+2y=17······①2x+3y=9······②3x+4y=24·········①5x+4y=32·····② 1+2+3+4+5+6+7+8+9+1+11+12+13+14+15````````1+2+3+4+5+6+7+8+9+1+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28++29+30+31+32+33+34+35+36+37+38+39+40+41+42+43+44+45+46+47+48+49+50·································· 急·····················1+2+3+...+999=? 1 2 9 10 25 26 ··· 4 3 8 11 24 27 ··· 5 6 7 12 23 26··· 17 1816 15 14 13 22 29···1 2 9 10 25 26 ··· 4 3 8 11 24 27 ··· 5 6 7 12 23 26···16 15 14 13 22 29·· ·17 18 19 20 21 30···36 35 34 33 32 31··· · 急求线性代数计算N阶行列式的简答1 2 2 ···22 2 2···22 2 3···2··· ···· ·2 2 2···N1 2 2···2 2 2 2···2 D= 2 2 3···2 ··· · · 左右两边是两条竖线。省略号是指的一直到N啊 ··· · · 2 2 2· 计算1-3+5-7+9-11+··········+97-99= 解方程:6/x+2=3/7 4/3x-25%==33 4/3-0.25=12/5x是未知数·············· 1+2++3+··········+10000= 一直关于x的方程为3x+a=5-6x1 有唯一的解2 3 有无数个解急································那么当a b 满足什么条件时 22·2X=11·1×5 （-2）+（+12）+（-22）+（+32）+（-42）+···+（-82）+（+92）=? 1+2+3-4+5+6+7-8+······+29+30+31-32= 下列说法错误的是····································································（ ）（A）画线段AB=3厘米； （B）画射线AB=3厘米；（C）在射线AC上截 32÷6=5······2 16÷3=5······1 被除数,除数,商,余数有什么变化?(用一句话表示）