18加(20加x)除以[1减(1减3分之1)乘百分之30]=108
来源:学生作业帮助网 编辑:作业帮 时间:2024/10/06 21:07:03
你这样的叙述根本没有办法写出式子来
X-(X-1)/2=1+(X+2)/5两边乘以1010X-5(X-1)=10+2(X+2)3X=9X=3
1/x+1/y=2(x+y)/xy=2x+y=2xy(2x-xy+2y)/(3x+5xy+3y)=[2(x+y)-xy]/[3(x+y)+5xy]=(4xy-xy)/(6xy+5xy)=3xy/11x
x=-1/3
用一式*28-二式*24解出Y=60,再解出X=40
x÷3+1=x÷2-1/42x+6=3x-3/2x=6+3/2=7又1/2
x等于一
因为x^2-x^2/2=3==>x^2=6==>x=根号61/(1-x)-(1/(1x))/(x/(x^2-1)x)=1/(1-x)-(1/(1x))/((xx^3-x)/(x^2-1))=1/(1-
是(x-1)/(x-2+1)=3吗x-1=3x-3无解
2x-(x+1)÷2=2+(x+1)÷22x-0.5x-0.5=2+0.5x+0.51.5x-0.5=0.5x+2.51.5x-0.5x=2.5+0.5x=3
你好!由于分母的极限=(1+1)^2=4分子的极限=1^1-1+1=1所以极限=1/4这个题目的极限直接是分子和分母的极限都存在的情况,直接做除就可以了哦
2/(x²-1)+1/(x+1)=1去分母,两边乘以最简公分母x²-12+x-1=x²-1x²-x-2=0(x+1)(x-2)=0x1=-1,x2=2当x=-1
(x-1)(x+2)(x+3)(x+6)+20=0(x-1)(x+6)(x+2)(x+3)+20=0(x^2+5x-6)(x^2+5x+6)+20=0(x^2+5x)^2-36+20=0(x^2+5x
(2x+1)/3-(x+1)/6=22(2x+1)-(x+1)=124x+2-x-1=123x=12-1x=11/3
解方程:1/(X-1)+2/(X-2)=3/(X-1)2/(X-2)=2/(X-2)变成了:X-2=X-1方程无解的,是题目有问题吧
(x+1)÷3=(x-1/4)÷2等式两边同时乘以6则(x+1)×2=(x-1/4)×32x+2=3x-3/4x=11/4
(x+1)/2=(3x-1)/2-1x+3=3x-1x=2