0.4x-0.25(2000-x)=110
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若1+x+x*x+x*x*x=0,求x+x*x+x*x*x+.+x(2000次幂)
0.4x-0.25(2000-x)=110
(x+x)+(x-x)+(x/x)=11.2
160乘25%-1.3x=17.9 x/5-x/6=0.4 3(x+2)=40+11 0.3/0.5=x+1/2x-1 2.5/(x—0.5)=25% 1/3:0.25=80%:x160乘25%-1.3x=17.9x/5-x/6=0.43(x+2)=40+110.3/0.5=x+1/2x-12.5/(x—0.5)=25%1/3:0.25=80%:x
x*x*x*x+2008x*x+2007x+2008(提示:x*x*x-1=(x-1)*(x*x+x+1))
matlab中a=[x(11)/x,x(12)/x;x(21)/x,x(22)/x;x(31)/x,x(32)/x;x(41)/x,x(42)/x;x(51)/x,x(52)/x]咋错了
(2000*0.4)+x /(2000+x )=0.5
(18+x)-0.4x=19.2 求x
15(x-0.4)=12x+0.25
12(x+0.25)=15(x-0.4)
x+(x-2000)+(x+1000)=15500
(74+x)/(11+x)=4 求x
0.25x=0.5(13-x)
7.72-x=1.8(x+0.4)
0.8X(x-0.4)=8
x^2=(0.4X)(0.
先观察下列各式,(x+5)(x+6)=x²+11x+30 (x-5)(x-6)=x²-11x+30先观察下列各式,(x+5)(x+6)=x²+11x+30(x-5)(x-6)=x²-11x+30(x-5)(x+6)=x²+x-30(x+5)(x-6)=x²-x-30(1)乘
x+4x+8=4x+11 x(2x-4)=5-8x解方程急!