x-[(x-3500)25%-1005]=28000解
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![x-[(x-3500)25%-1005]=28000解](/uploads/image/f/890768-56-8.jpg?t=x-%5B%28x-3500%2925%25-1005%5D%3D28000%E8%A7%A3)
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
25%X+(25%X-5)+20=X50%x+15=x50%x=15x=30
(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
|x|
(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^
x
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+x*0.0683=3500===>x*(1+0.0683)=3500===>1.0683x=3500===>x=3500/1.0683===>x≈3276.2332
(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=1470%x=14x=20x+25%x=20125%x=20x=16
x-[(x-3500)*0.2-555]=9553x-[0.2x-700-555]=95530.8x+1255=95530.8x=8298x=10372.5
移项0.25x+0.25x+0.6x-x=300.1x=30x=30÷0.1x=300
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
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: