x-0.75x=0.05解方程
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4x+3.6﹦8x-4.83.6+4.8=8x-4x4x=8.4x=2.175(x-0.75)=60x75x-75×0.75=60x75x-60x=75×0.7515x=75×0.75x=5×0.75
0.75x+0.50(16-x)=10.500.75x+8-0.5x=10.500.25x=10.5-80.25x=2.5x=2.5÷0.25x=10
X/(x-30)=(x+40)/XX^2=(X-30)*(X+40)X^2=X^2+40X-30X-120010X=1200X=120
只有一个实根.设f(x)=x^3+2x-19为单调增函数.所以只有一个实根.下面来求这个实根由于f(2)=-7f(3)=11所以这个根在(2,3)内.利用二分法求这个解.取x0=5/2f(5/2)=1
1.5/0.75=22x/3x-10=22x=6x-204x=20x=5再问:?再答:1.5/0.75=15/7.=150/75=2再问:题目是解比例,外项等于内项再答:2=2:1再问:外项的积等于内
x^3-x^2-2x=0x(x^2-x-2)=0x(x-2)(x+1)=0x=0或x=-1或x=2
本人提供一个解法:由于(x-2004)/(x-2005)=1+1/(x-2005),其它三个分式同样进行拆分,最终得出:[1+1/(x-2005)]-[1+1/(x-2006)]=[1+1/(x-20
x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)x/(x-2)=2x/(x-3)+(1-x)/(x-2)(x-3)x(x-3)/(x-2)(x-3)=2x(x-2)/(x-2)(x-3)
x-0.75x=150.25x=15x=15/0.25x=60
0.75x-0.6x=45-30.15x=42x=42÷0.15x=280
(x+x)+(x-x)+(xx)+(x/x)=1002x+0+x²+1=100x²+2x+1=100(x+1)²=10²x+1=10或x+1=-10x=9或x=
方程是啥?如果为:x^0.75-x^0.25=0.75令t=x^0.25,则x^0.75=t^3方程化为:t^3-t=0.75,解得:t=1.26255112740716x=t^4=2.5409486
0.75x+3×0.8x=2.50.75x+2.4x=2.53.15x=2.5x=2.5÷3.15x=50/63
0.25x=5.6(合并同类项)x=5.6/0.25(移项)x=22.4望采纳!
解是400(1-0.75)x=1000.25x=100x=100÷0.25x=400
3.2x=x+0.752.2x=0.75x=375/11
x-0.75x=0.42合并同类项得:0.25x=0.42系数化为1得:x=0.42÷0.25得:x=1.68
苍月Swart,你好:x-0.75x=420.25X=42X=42÷0.25X=168
x-0.05x=5.7x(1-0.05)=5.7x=5.7/0.95=6