500 (X-25) 5 30(X-25) X=35-搜答案-神马作文网

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展开式的通项为Tr+1＝(−12)rCr10x30−5r令30-5r=0得r=6故展开式的常数项为(−12)6C610＝10532故答案为10532

x-2x+3x-4x+...+99x-100x=25(1-2)x+(3-4)x+…+(99-100)x=25-x-x-…-x=25-50x=25x=-1/2

4/5x+x/(5x-25)=5/(x^2-5x)(4x-20)/5x(x-5)+x^2/5x(x-5)=25/5x(x-5)4x-20+x^2=254x+x^2=45x^2+4x+2^2=45(x+

(0.2x+25)/(0.8x-25)=5/65(0.8x-25)=6(0.2x+25)4x-125=1.2x+1502.8x=275x=1375/14

（X+X)+(X-X)+(X*X)+(X/X)=1002X+0+X*X+1=1002X+X*X=99X(X+2)=99X=9再问：请问X(X+2)=99解为什么就等于9了呢没看懂再答：换成算术法你就明

2x/5x-3除以3/25x平方-9*x/5x+3=[2x/(5x-3)]÷[3/(25x^2-9)]×[x/(5x+3)]=[2x/(5x-3)]÷[3/(5x+3)(5x-3)]×[x/(5x+3

x-25%X-(25%x-25)=50x-0.25X-0.25X+25=500.5X=25X=50再问：很快，谢谢你

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（2x+5)(4x*x-10x+25)=8x(x*x+1)8x^3-20x^2+50x+20x^2-50x+125=8x^3+8x,8x=125,x=125/8或利用立方和公式8x^3+125=8x^

500/(X-25)+5+30（X-25）/X=35500/(x-25)+30(x-25)/x=3050/(x-25)+3(x-25)/x=350x+3(x-25)²=3x(x-25)50x

x

500/x+x+30x/25=30500/x+11x/5=30500+11x^2/5=30x11x^2-150x+2500=0△=150*150-4*11*2500

中间是乘号吗?750/x²=15/x显然x不等于0则两边乘x²750=15xx=50

(x-5分之x-5-x分之x)\x的平方-25分之2x=2x/(x-5)*(x-5)(x+5)/2x=x+5

x-30%x=14x+25%x=20

x-30%x=1470%x=14x=20x+25%x=20125%x=20x=16

x-60%x-25%x=25%x-30

移项0.25x+0.25x+0.6x-x=300.1x=30x=30÷0.1x=300

x²/x-5+25/5-x

原式=x²/(x-5)-25/(x-5)=(x²-25)/(x-5)=(x+5)(x-5)/(x-5)=x+5

答：结论是无解的设1和4中间的正方形边长为x则左边中间的正方形边长为x+1左下角边长为x+1+x=2x+1所以：右下角正方形边长2x+1+x-4=3x-3所以：最大的正方形底部边长=2x+1+3x-3

，x

解题思路：同学你好，本题利用同角三角函数的基本关系求解，具体过程见解析解题过程：

14x+6x=80*50％20x=40x=40/20x=225％x+4分之3x=500x/4+3x/4=500x=500